use bash to execute check-generateLogic-committed

because powershell seems not to respect the exit code
moreover:
- move to own workflow as it seems to interfere with other steps
- stripIndent() needs to have the same indent as with jdk13+ no longer
  groovy's stripIndent is called but jdk's one
  => see https://issues.apache.org/jira/browse/GROOVY-9423

.github/workflows/java-windows.yml

@@ -21,9 +21,10 @@ jobs:
 
             -   name: check generateLogic committed
                 run: ./gradle/scripts/check-generateLogic-committed.sh
+                shell: bash
 
             -   name: buildNonDeprecatedJvm
-                run: ./gradlew buildNonDeprecatedJvm
+                run: ./gradlew clean buildNonDeprecatedJvm
 
             -   name: Cache android jar
                 id: android-cache