Update release/changelog generation workflow after main/develop split (DCNE-890)

[samiib]

Related Issue(s)

Proposed Changes

• Made the changelog comparison ref configurable via a new compare_ref workflow_dispatch input (defaults to develop), instead of hard-coding develop in both the collection checkout step and the release script's compare URL. This allows generating a changelog against any branch, tag, or commit SHA.
• Pinned the release_script checkout to a specific commit (c3405128f9ff87cf5231cf2aac8e03424921b1a6) rather than a mutable ref, so the workflow always runs a known-good version of the automation script.
• Added an optional target_version workflow_dispatch input, allowing the release version to be manually overridden (e.g. 2.0.0) instead of relying solely on the automatically calculated version derived from bug/minor/major commit types.
• Fixed the python-version input being unintentionally parsed as 3.1 instead of 3.10 due to YAML interpreting the unquoted value as a float; it is now quoted as a string.

Test Notes

• Test run of the changelog generation -> https://github.com/samiib/ansible-nd/actions/runs/32930754394/job/98062388169
• Example release PR result -> https://github.com/samiib/ansible-nd/pull/4/changes
  Note: The release PR will still need manual adjustment after generation.

Cisco Nexus Dashboard Version

Related ND API Resource Category

• analyze
• infa
• manage
• onemanage
• other

Checklist

• Latest commit is rebased from develop with merge conflicts resolved
• New or updates to documentation has been made accordingly
• Assigned the proper reviewers