ci(bump-version-pr): support custom base version and target branch

[mitsudome-r]

Description

Summary

Current bump-version-pr workflow fails when there are packages with different versions described in package.xml versions(example). This reworks the bump-version-pr workflow so it can bump from any specified base version, target any branch, and produces a clean single-commit PR with a more informative description.

Changes

New workflow_dispatch inputs

• base_version — git tag to bump from. Defaults to the latest semantic version tag (MAJOR.MINOR.PATCH) found in the repo.
• target_branch — branch to open the PR against. Defaults to main.

The previous behavior was hardcoded to check out the humble branch and target main. Both are now configurable.

Auto-align diverged packages before catkin_prepare_release

Packages whose <version> in package.xml does not match base_version would otherwise cause catkin_generate_changelog / catkin_prepare_release to fail. The workflow now, in a single pass over all package.xml files:

• rewrites the <version> to base_version, and
• deletes the package's sibling CHANGELOG.rst
• add PR description about deleted CHANGELOG.rst

Related links

Parent Issue:

• Release Autoware 1.8.0 autoware#7047

How was this PR tested?

Tested on my fork:

• Action: https://github.com/mitsudome-r/autoware_universe/actions/runs/25223075552/job/73959844920
• created PR: chore: bump version to 0.51.0 mitsudome-r/autoware_universe#48

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

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