Fix showing bundler v1 deprecation warnings in PR message and logs

[kbukum1]

What are you trying to accomplish?

This PR ensures that deprecation warnings for bundler v1 are properly displayed in both the pull request message and the logs.

Anything you want to highlight for special attention from reviewers?

There are two key fixes in this PR:

1. PR Message Warning: The bundler v1 deprecation warning is now correctly displayed in the PR message without including the "Bumps rails..." message within the warning block.

   Example of the fixed warning:
   

2. Logging Warning Consistency: In the log output, the second deprecation warning message ("Please upgrade to version v2.") should properly work under the updater thread.

Checklist

After fix:

• I have run the complete test suite to ensure all tests and linters pass.
• I have thoroughly tested my code changes to ensure they work as expected, including adding additional tests for new functionality.
• I have written clear and descriptive commit messages.
• I have provided a detailed description of the changes in the pull request, including the problem it addresses, how it fixes the problem, and any relevant details about the implementation.
• I have ensured that the code is well-documented and easy to understand.

[abdulapopoola]

Please can you add screenshots of your local run showing the fix too.

[kbukum1]

Tested in https://github.com/dsp-testing/dependabot-all-updates-test-grouped-10554-3

PR warning message is showing properly

Log is fixed.

CC: @Nishnha , @abdulapopoola