RATIS-2354. Bump Apache parent POM to 35

[adoroszlai]

What changes were proposed in this pull request?

• Bump Apache parent POM to 35
• Remove Apache Maven plugin version overrides
• Remove unused plugins
• Remove duplicate execution of maven-source-plugin, which produced a warning previously:

  [INFO] --- source:3.2.1:jar-no-fork (attach-sources) @ ratis-docs ---
  [INFO] Building jar: /home/runner/work/ratis/ratis/ratis-docs/target/ratis-docs-3.3.0-SNAPSHOT-sources.jar
  ...
  [INFO] --- source:3.2.1:jar-no-fork (ratis-java-sources) @ ratis-docs ---
  [WARNING] artifact org.apache.ratis:ratis-docs:java-source:sources:3.3.0-SNAPSHOT already attached, replace previous instance
  

  but is now an error with the plugin's new version:

  [INFO] --- source:3.3.1:jar-no-fork (attach-sources) @ ratis-docs ---
  [INFO] Building jar: /home/runner/work/ratis/ratis/ratis-docs/target/ratis-docs-3.3.0-SNAPSHOT-sources.jar
  ...
  [INFO] --- source:3.3.1:jar-no-fork (ratis-java-sources) @ ratis-docs ---
  [ERROR] We have duplicated artifacts attached.
  

https://issues.apache.org/jira/browse/RATIS-2354

How was this patch tested?

CI:
https://github.com/adoroszlai/ratis/actions/runs/19260498945

[szetszwo]

+1 the change looks good.

[adoroszlai]

Thanks @szetszwo for the review.