[CI] Restore Java 17 in the Spark Versions PreCommit so the Spark 4 module runs

[tkaymak]

beam_PreCommit_Java_Spark_Versions runs :runners:spark:3:sparkVersionsTest :runners:spark:4:build -Pjava17Home=$JAVA_HOME_17_X64. #39205 changed its Java setup from 17 plus 11 to 11 only, so JAVA_HOME_17_X64 is empty, java17Home resolves to nothing, and BeamModulePlugin disables every task of runners/spark/4 because its required JDK is missing. Every run since then prints

> Task :runners:spark:4:compileJava SKIPPED
> Task :runners:spark:4:test SKIPPED
> Task :runners:spark:4:build SKIPPED
BUILD SUCCESSFUL

and reports green. The Spark 4 unit tests, including the streaming source tests from #39971 and the translator tests in #40090, have not executed in CI in that period. beam_PreCommit_Java compiles the module on its native JDK but does not run its tests.

This restores the two version setup that #38453 introduced, same pattern as beam_PreCommit_SQL_Java17. Java 11 stays the default JDK for the Spark 3 part of the job, Java 17 is handed to the Spark 4 module through java17Home.

Verification after merge: the next master run of the workflow must show :runners:spark:4:test executed. Local equivalent, ./gradlew :runners:spark:4:build -Pjava17Home=/path/to/jdk17 runs 234 tests.

R: @Abacn

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