feat: align and enhance GitHub Actions workflows

[Rohit-8541]

Summary

Align and enhance GitHub Actions workflows across all SDKs as per requirements.

Changes Made

✅ Replace bump2version with bump-my-version

• Updated .releaserc to use bump-my-version with correct syntax
• Updated create-release.yml workflow to install bump-my-version
• Migrated .bumpversion.cfg configuration to pyproject.toml
• Deleted .bumpversion.cfg file

✅ Remove CHANGELOG.md

• Deleted CHANGELOG.md file
• Removed @semantic-release/changelog plugin from .releaserc
• Removed @semantic-release/changelog dependency from package.json
• Removed Changelog URL from pyproject.toml
• Release notes now appear only on GitHub releases page

✅ Optimize Workflows

• Changed checkout fetch-depth from 0 to 1 in all workflows (faster clones)
• Renamed publish.yaml to publish.yml for consistency
• Improved workflow structure and step naming
• Enhanced error handling (fail-fast behavior)

✅ Configure GitHub Releases

• Configured @semantic-release/github plugin
• Release notes automatically added to GitHub releases
• No more CHANGELOG.md maintenance required

Testing

✅ Tested in personal fork: https://github.com/Rohit-8541/secrets-manager-python-sdk

Test Results:

• ✅ Workflow completed successfully
• ✅ Release created: https://github.com/Rohit-8541/secrets-manager-python-sdk/releases/tag/v1.0.0
• ✅ Release notes generated on GitHub release page
• ✅ NO CHANGELOG.md file in repository
• ✅ bump-my-version working correctly
• ✅ All workflows using fetch-depth: 1

Files Changed (9 files)

• .bumpversion.cfg - DELETED
• .github/workflows/codeql-analysis.yml - Updated fetch-depth
• .github/workflows/create-release.yml - Updated to use bump-my-version
• .github/workflows/publish.yml - Renamed from .yaml, updated fetch-depth
• .releaserc - Updated for bump-my-version, removed changelog
• CHANGELOG.md - DELETED
• package.json - Removed changelog dependency
• pyproject.toml - Added bump-my-version config, removed changelog URL
• ibm_secrets_manager_sdk/version.py - Version sync

Checklist

• Tested in personal repository
• All workflows pass
• No CHANGELOG.md generated
• Release notes on GitHub releases
• bump-my-version working correctly
• Consistent naming across workflows
• Error handling implemented

[Rohit-8541]

https://github.ibm.com/security-services/secrets-manager-project-management/issues/5146

[Rohit-8541]

Issue with fetch-depth: 1

After further review and manager feedback, changing fetch-depth from 0 to 1 will cause semantic-release to fail because it needs full git history to:

• Calculate the next version based on conventional commits
• Generate release notes from all commits since last release
• Detect all tags and releases

Recommendation

Revert fetch-depth: 1 back to fetch-depth: 0 in all workflows:

• .github/workflows/create-release.yml
• .github/workflows/codeql-analysis.yml
• .github/workflows/publish.yml

Reference

Manager's feedback: "Strongly recommend either: Revert to fetch-depth: 0"

I will update this PR to fix the fetch-depth issue.