fix: take in account Jenkins versioning format in versionLT and Compare-VersionLessThan

[lemeurherve]

This PR updates versionLT and Compare-VersionLessThan to take in account Jenkins versioning format.

It adds real world example tests from #1456 and linked issues, and removes old one about alpha and beta versions predating current Jenkins versioning format and not used AFAIK.

Ref:

• Fixes Unable to upgrade plugin in Docker Jenkins due to version format #1456

Testing done

make test

$ pwsh
PS > Import-Module -DisableNameChecking -Force ./jenkins-support.psm1
PS > if($(Compare-VersionLessThan '3.12.0.0' '3.12.0-36.vd97de6465d5b_')) { exit 0 } else { exit -1 }  
PS > Write-Output $?

Submitter checklist

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests that demonstrate the feature works or the issue is fixed

[timja]

Thanks! looks reasonable