build: Skip CI workflows for changes in benchmarks directory (#3599)

Add `benchmarks/**` to paths-ignore in PR build and Spark SQL test
workflows so that changes to benchmark scripts and data do not
trigger expensive CI runs.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: andygrove

.github/workflows/iceberg_spark_test.yml

@@ -26,6 +26,7 @@ on:
     branches:
       - main
     paths-ignore:
+      - "benchmarks/**"
       - "doc/**"
       - "docs/**"
       - "**.md"
@@ -34,6 +35,7 @@ on:
       - "spark/src/test/scala/org/apache/spark/sql/benchmark/**"
   pull_request:
     paths-ignore:
+      - "benchmarks/**"
       - "doc/**"
       - "docs/**"
       - "**.md"

.github/workflows/pr_build_linux.yml

@@ -26,6 +26,7 @@ on:
     branches:
       - main
     paths-ignore:
+      - "benchmarks/**"
       - "doc/**"
       - "docs/**"
       - "**.md"
@@ -34,6 +35,7 @@ on:
       - "spark/src/test/scala/org/apache/spark/sql/benchmark/**"
   pull_request:
     paths-ignore:
+      - "benchmarks/**"
       - "doc/**"
       - "docs/**"
       - "**.md"

.github/workflows/pr_build_macos.yml

@@ -26,6 +26,7 @@ on:
     branches:
       - main
     paths-ignore:
+      - "benchmarks/**"
       - "doc/**"
       - "docs/**"
       - "**.md"
@@ -34,6 +35,7 @@ on:
       - "spark/src/test/scala/org/apache/spark/sql/benchmark/**"
   pull_request:
     paths-ignore:
+      - "benchmarks/**"
       - "doc/**"
       - "docs/**"
       - "**.md"

.github/workflows/spark_sql_test.yml

@@ -26,6 +26,7 @@ on:
     branches:
       - main
     paths-ignore:
+      - "benchmarks/**"
       - "doc/**"
       - "docs/**"
       - "**.md"
@@ -34,6 +35,7 @@ on:
       - "spark/src/test/scala/org/apache/spark/sql/benchmark/**"
   pull_request:
     paths-ignore:
+      - "benchmarks/**"
       - "doc/**"
       - "docs/**"
       - "**.md"