add TEST_CSFLE flag to force test run

Author: tadjik1

.evergreen/config.yml

@@ -4085,6 +4085,7 @@ buildvariants:
     expansions:
       NODE_LTS_VERSION: 24
       CLIENT_ENCRYPTION: true
+      TEST_CSFLE: true
     tasks:
       - test-latest-server
       - test-latest-replica_set

.evergreen/generate_evergreen_tasks.js

@@ -891,7 +891,8 @@ BUILD_VARIANTS.push({
   run_on: GRAVITON_OS,
   expansions: {
     NODE_LTS_VERSION: LATEST_LTS,
-    CLIENT_ENCRYPTION: true
+    CLIENT_ENCRYPTION: true,
+    TEST_CSFLE: true
   },
   tasks: gravitonTasks
 });