test: regenerate tpcds-v1.4/{q24a,q24b} and tpcds-v2.7.0/q24 goldens

`CometCaseConversionBase` no longer gates compat with the bespoke
`spark.comet.caseConversion.enabled` conf inside `convert()`. The
fallback now flows through the standard dispatcher path, so the
`BroadcastHashJoin` COMET tag on `upper(ca_country)` switches from

  "Comet is not compatible with Spark for case conversion in
  locale-specific cases. Set spark.comet.caseConversion.enabled=true
  to enable it anyway."

to the dispatcher's per-expression Incompatible message, including
the `spark.comet.expression.Upper.allowIncompatible=true` opt-in and
the compat-guide link. The plan shape is unchanged; only the two
annotation lines in each affected golden differ.

Author: andygrove

spark/src/test/resources/tpcds-plan-stability/approved-plans-v1_4/q24a/extended.txt

@@ -7,7 +7,7 @@ Filter
 :                 +- Exchange
 :                    +- HashAggregate
 :                       +- Project
-:                          +-  BroadcastHashJoin [COMET: Comet is not compatible with Spark for case conversion in locale-specific cases. Set spark.comet.caseConversion.enabled=true to enable it anyway.]
+:                          +-  BroadcastHashJoin [COMET: upper(ca_country#1) is not fully compatible with Spark (Results can vary depending on locale and character set (https://github.com/apache/datafusion-comet/issues/2190).). To enable it anyway, set spark.comet.expression.Upper.allowIncompatible=true. For more information, refer to the Comet Compatibility Guide (https://datafusion.apache.org/comet/user-guide/compatibility.html).]
 :                             :- CometNativeColumnarToRow
 :                             :  +- CometProject
 :                             :     +- CometBroadcastHashJoin
@@ -51,7 +51,7 @@ Filter
             +- Exchange
                +- HashAggregate
                   +- Project
-                     +-  BroadcastHashJoin [COMET: Comet is not compatible with Spark for case conversion in locale-specific cases. Set spark.comet.caseConversion.enabled=true to enable it anyway.]
+                     +-  BroadcastHashJoin [COMET: upper(ca_country#2) is not fully compatible with Spark (Results can vary depending on locale and character set (https://github.com/apache/datafusion-comet/issues/2190).). To enable it anyway, set spark.comet.expression.Upper.allowIncompatible=true. For more information, refer to the Comet Compatibility Guide (https://datafusion.apache.org/comet/user-guide/compatibility.html).]
                         :- CometNativeColumnarToRow
                         :  +- CometProject
                         :     +- CometBroadcastHashJoin

spark/src/test/resources/tpcds-plan-stability/approved-plans-v1_4/q24b/extended.txt

@@ -7,7 +7,7 @@ Filter
 :                 +- Exchange
 :                    +- HashAggregate
 :                       +- Project
-:                          +-  BroadcastHashJoin [COMET: Comet is not compatible with Spark for case conversion in locale-specific cases. Set spark.comet.caseConversion.enabled=true to enable it anyway.]
+:                          +-  BroadcastHashJoin [COMET: upper(ca_country#1) is not fully compatible with Spark (Results can vary depending on locale and character set (https://github.com/apache/datafusion-comet/issues/2190).). To enable it anyway, set spark.comet.expression.Upper.allowIncompatible=true. For more information, refer to the Comet Compatibility Guide (https://datafusion.apache.org/comet/user-guide/compatibility.html).]
 :                             :- CometNativeColumnarToRow
 :                             :  +- CometProject
 :                             :     +- CometBroadcastHashJoin
@@ -51,7 +51,7 @@ Filter
             +- Exchange
                +- HashAggregate
                   +- Project
-                     +-  BroadcastHashJoin [COMET: Comet is not compatible with Spark for case conversion in locale-specific cases. Set spark.comet.caseConversion.enabled=true to enable it anyway.]
+                     +-  BroadcastHashJoin [COMET: upper(ca_country#2) is not fully compatible with Spark (Results can vary depending on locale and character set (https://github.com/apache/datafusion-comet/issues/2190).). To enable it anyway, set spark.comet.expression.Upper.allowIncompatible=true. For more information, refer to the Comet Compatibility Guide (https://datafusion.apache.org/comet/user-guide/compatibility.html).]
                         :- CometNativeColumnarToRow
                         :  +- CometProject
                         :     +- CometBroadcastHashJoin

spark/src/test/resources/tpcds-plan-stability/approved-plans-v2_7/q24/extended.txt

@@ -10,7 +10,7 @@ CometNativeColumnarToRow
          :                 +- Exchange
          :                    +- HashAggregate
          :                       +- Project
-         :                          +-  BroadcastHashJoin [COMET: Comet is not compatible with Spark for case conversion in locale-specific cases. Set spark.comet.caseConversion.enabled=true to enable it anyway.]
+         :                          +-  BroadcastHashJoin [COMET: upper(ca_country#1) is not fully compatible with Spark (Results can vary depending on locale and character set (https://github.com/apache/datafusion-comet/issues/2190).). To enable it anyway, set spark.comet.expression.Upper.allowIncompatible=true. For more information, refer to the Comet Compatibility Guide (https://datafusion.apache.org/comet/user-guide/compatibility.html).]
          :                             :- CometNativeColumnarToRow
          :                             :  +- CometProject
          :                             :     +- CometBroadcastHashJoin
@@ -54,7 +54,7 @@ CometNativeColumnarToRow
                      +- Exchange
                         +- HashAggregate
                            +- Project
-                              +-  BroadcastHashJoin [COMET: Comet is not compatible with Spark for case conversion in locale-specific cases. Set spark.comet.caseConversion.enabled=true to enable it anyway.]
+                              +-  BroadcastHashJoin [COMET: upper(ca_country#2) is not fully compatible with Spark (Results can vary depending on locale and character set (https://github.com/apache/datafusion-comet/issues/2190).). To enable it anyway, set spark.comet.expression.Upper.allowIncompatible=true. For more information, refer to the Comet Compatibility Guide (https://datafusion.apache.org/comet/user-guide/compatibility.html).]
                                  :- CometNativeColumnarToRow
                                  :  +- CometProject
                                  :     +- CometBroadcastHashJoin