build: update release workflow to create PR with release changes

[BryanttV]

Description

This PR updates the current release.yml. The following changes were performed:

1. Renamed release.yml to create-release-pr.yml. Changes to the repository can only be made through a Pull Request. This workflow creates a release PR to update the CHANGELOG and bump version.
2. Created a new github-release.yml workflow. Once you have created and merged the PR using the above workflow, you must run this workflow to create the GitHub release.

Supporting information

Current workflow execution failed

Testing instructions

These changes were tested in a fork of this repository (openedx-filters).

Deadline

None

Checklists

Check off if complete or not applicable:

Merge Checklist:

• All reviewers approved
• Reviewer tested the code following the testing instructions
• CI build is green
• Changelog entry added using scriv with short description of the change
• Documentation updated (not only docstrings)
• Code dependencies reviewed
• Fixup commits are squashed away
• Unit tests added/updated
• Noted any: Concerns, dependencies, migration issues, deadlines, tickets

Post Merge:

• Trigger the release workflow to create a new GitHub release.
• Check new version is pushed to PyPI after tag-triggered build is finished.
• Delete working branch (if not needed anymore)
• Upgrade the package in the Open edX platform requirements (if applicable)

[openedx-webhooks]

Thanks for the pull request, @BryanttV!

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[mphilbrick211]

Hi @openedx/hooks-extension-framework! Would someone be able to please review / merge this for us? Thanks!

[mphilbrick211]

Ping on this, @openedx/hooks-extension-framework!