chore: cleanup release-please config

[diegomarquezp]

This PR cleans up the .github/release-please.yml file by removing redundant options and the bump-minor-pre-major setting for major releases.

[gemini-code-assist]

Summary of Changes

Hello @diegomarquezp, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on refining the automated release process by cleaning up the .github/release-please.yml configuration file. The changes aim to simplify the setup by removing redundant options and adjusting specific release behaviors for various branches, leading to a more concise and maintainable release configuration.

Highlights

• Configuration Simplification: Streamlined the .github/release-please.yml file by removing redundant options from individual branch configurations, making the file more concise and easier to manage.
• Removed bumpMinorPreMajor Setting: Eliminated the bumpMinorPreMajor setting from several branch configurations, which affects how minor versions are handled before a major release for those specific branches.
• Redundant Option Cleanup: Removed handleGHRelease, manifest, primaryBranch, and extraFiles options from branch-specific settings, indicating these are either inherited from global configurations or are no longer necessary at the branch level.

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[gemini-code-assist]

Code Review

This pull request effectively streamlines the .github/release-please.yml configuration by removing redundant properties from branch-specific setups. This simplification enhances maintainability by relying on inheritance from the top-level configuration. The changes align with the stated goal of cleaning up the file. I have one minor suggestion to further improve the consistency of the branch definitions.

[gemini-code-assist]

For consistency with other branch configurations in this file (like 2.23.x), it's better to list the branch key first. This improves readability and makes the file easier to maintain.

    - branch: 2.54.x
      releaseType: java-backport
    - branch: 2.59.x
      releaseType: java-backport

[sonarqubecloud]

Quality Gate passed for 'gapic-generator-java-root'

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[sonarqubecloud]

Quality Gate passed for 'java_showcase_integration_tests'

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud