[FLINK-40510][build] Bump Apache Parent pom to 39

[snuyanzin]

What is the purpose of the change

The PR bumps version of parent pom to 39

Brief change log

pom

Verifying this change

existing tests

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): (yes)
• The public API, i.e., is any changed class annotated with @Public(Evolving): (no)
• The serializers: (no)
• The runtime per-record code paths (performance sensitive): (no)
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: ( no )
• The S3 file system connector: (no )

Documentation

• Does this pull request introduce a new feature? ( no)
• If yes, how is the feature documented? (not applicable)

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[flinkbot]

CI report:

• 8ad31fa Azure: SUCCESS

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[MartijnVisser]

Should we bump org.commonjava.maven.plugins:directory-maven-plugin to get rid of

19:14:11.291 [WARNING] *****************************************************************
19:14:11.292 [WARNING] * Your build is requesting parallel execution, but this         *
19:14:11.292 [WARNING] * project contains the following plugin(s) that have goals not  *
19:14:11.292 [WARNING] * marked as thread-safe to support parallel execution.          *
19:14:11.292 [WARNING] * While this /may/ work fine, please look for plugin updates    *
19:14:11.292 [WARNING] * and/or request plugins be made thread-safe.                   *
19:14:11.292 [WARNING] * If reporting an issue, report it against the plugin in        *
19:14:11.292 [WARNING] * question, not against Apache Maven.                           *
19:14:11.292 [WARNING] *****************************************************************
19:14:11.292 [WARNING] The following plugins are not marked as thread-safe in Flink ::
19:14:11.292 [WARNING]   org.commonjava.maven.plugins:directory-maven-plugin:0.1
19:14:11.292 [WARNING] 
19:14:11.292 [WARNING] Enable debug to see precisely which goals are not marked as thread-safe.
19:14:11.292 [WARNING] *****************************************************************

[snuyanzin]

makes sense, added

[snuyanzin]

now there is no such warnings in CI 👍
https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=78502&view=logs&j=52b61abe-a3cc-5bde-cc35-1bbe89bb7df5&t=54421a62-0c80-5aad-3319-094ff69180bb&l=264

[MartijnVisser]

LGTM

[snuyanzin]

Merged as a922643