Remove PR message workflow check for bots

[Incogdino]

Previously, adding a new contributor triggers a PR message workflow to check for PR messages. By default, no PR message is added by the bot.

Removing the check for PR messages for bots will likely not affect any essential checks.

What is the purpose of this pull request?

• Documentation update
• Bug fix
• [] Feature addition or enhancement
• Code maintenance
• DevOps
• Improve developer experience
• Others, please explain:

Closes #2561

Overview of changes:
Removed pr message workflow check for all bots.

Anything you'd like to highlight/discuss:
The updated workflow to check for PR message will skip for all bots.

Testing instructions:

The CI test was cloned and tested on a private GitHub repo.

Proposed commit message: (wrap lines at 72 characters)
Remove PR message workflow check for bots

Previously, adding a new contributor triggers a PR message workflow
to check for PR messages. By default, no PR message is added
by the bot.

Removing the check for PR messages for bots will likely not affect
any essential checks.

---

Checklist: ☑️

• Updated the documentation for feature additions and enhancements
• Added tests for bug fixes or features
• Linked all related issues
• No unrelated changes

---

Reviewer checklist:

Indicate the SEMVER impact of the PR:

• Major (when you make incompatible API changes)
• Minor (when you add functionality in a backward compatible manner)
• Patch (when you make backward compatible bug fixes)

At the end of the review, please label the PR with the appropriate label: r.Major, r.Minor, r.Patch.

Breaking change release note preparation (if applicable):

• To be included in the release note for any feature that is made obsolete/breaking

Give a brief explanation note about:

• what was the old feature that was made obsolete
• any replacement feature (if any), and
• how the author should modify his website to migrate from the old feature to the replacement feature (if possible).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.86%. Comparing base (4ed8781) to head (0a52447).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2598   +/-   ##
=======================================
  Coverage   51.86%   51.86%           
=======================================
  Files         127      127           
  Lines        5474     5474           
  Branches     1201     1201           
=======================================
  Hits         2839     2839           
  Misses       2340     2340           
  Partials      295      295           

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[tlylt]

👍