Remove flink 1.12 1.13

[je-ik]

Removes Flink runner 1.12 and 1.13 after 1.17 will be merged.

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[je-ik]

R: @Abacn

[github-actions]

Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control

[je-ik]

Marking this as blocker for 2.56.0, this should be trivial to merge.

[Abacn]

Thank you!

[Abacn]

Java PreCommit failing test

testExampleEchoPipeline (org.apache.beam.examples.subprocess.ExampleEchoPipelineTest) failed

org.apache.beam.sdk.Pipeline$PipelineExecutionException: java.lang.Exception: java.io.IOException: Cannot run program "/tmp/test-Echoo1141159604754263537/test-EchoAgain8445332997975022285.sh": error=26, Text file busy
	at org.apache.beam.runners.direct.DirectRunner$DirectPipelineResult.waitUntilFinish(DirectRunner.java:377)
...
Caused by: java.io.IOException: error=26, Text file busy
	at java.lang.UNIXProcess.forkAndExec(Native Method)

test not related to Flink runner, looks like a racing condition.

[Abacn]

Also please open another PR to update CHANGES.md (changing on this PR will cause many test rerun)