Update ShellCheck Action and Add differential PyLint Action

[jamacku]

Description

GitHub Action fedora-copr/vcs-diff-lint-action works similarly to redhat-plumbers-in-action/differential-shellcheck. It reports only newly added PyLint defects in SARIF format.

Based on our conversation in - #1007, I think you might be interested.

Type of change

• ci

How Has This Been Tested?

Manually by opening PR

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes need updates to the documentation. I have made corresponding changes to the documentation
• My changes generate no new warnings
• New and existing tests pass with my changes
• Any dependent changes have been merged and published

[aerorahul]

I am not quite well versed in this, so I have nothing to comment on this PR.

[WalterKolczynski-NOAA]

Added new actions to allowed list.

[WalterKolczynski-NOAA]

@jamacku thanks for the follow-up!