[Feature Request]: New platform scheduled pipeline to check external version updates

[eriqua]

Description

Implement a platform scheduled pipeline to check the latest version for all external sources, e.g., public external actions/steps or tools. Discuss a possible MVP with the team, for example:

Check https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuring-dependabot-version-updates

OR

• List all versioned resources (declarative JSON, yaml or other)
• Compare for each current vs latest
• Provide a job summary of the findings, highlighting what's new
• A step further could be to automatically create an issue whenever a mismatch

Versions to check

Note: First draft not exhaustive

• PSRule action
• Bicep
• Az cli
• PS version
• PS modules (Az, powershell-yaml)
• GH Runner/ADO Agent OS
• Autoassign PR action
• ...

[BernieWhite]

Dependabot can automatically bump PSRule action and other GitHub Actions. Config looks like this: https://github.com/Azure/PSRule.Rules.Azure/blob/001f49cffe50b10383934594ea8f926b8526fc13/.github/dependabot.yml#L25-L33