Improve support for ToolInstallation

[froque]

• JENKINS-68052 Improve powershell version selection
• JENKINS-76152 The powershell path is wrong when using a custom powershell release from a freestyle job

Better handling for ToolInstallation to use custom installations, behind defaults for Windows and Linux.

Testing done

• Tested with multiple PowerShellInstallation configurations.
• Tested migration of existing PowerShellInstallation configurations
• Tested on Linux and Windows

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

[splatteredbits]

Can we get a review on this please? This is something our team needs as well. Is there an new issue somewhere we can ping people on?

[MarkEWaite]

Can we get a review on this please? This is something our team needs as well. Is there an new issue somewhere we can ping people on?

While you are waiting for a review, you can install the pre-release build, use it, and report your results with it. That will help you by confirming that it solves your immediate problem and it will help the maintainer because they will know that one other user has confirmed it works for them.

powershell-hpi.zip

[froque]

I would like someone else to validate this PR. If no one does it, I will merge it in a few weeks.