Update-PSResource: Include local-copy prerelease string when deciding update applicability

[sean-r-williams]

PR Summary

This PR updates Microsoft.PowerShell.PSResourceGet.Cmdlets.UpdatePSResource to consider a locally-installed resource's prerelease string when comparing against the repository's available versions.

Fixes #1953.

PR Context

Currently, Update-PSResource only considers the locally-installed resource's version component from the PSResourceInfo.Version field, of type System.Version. This struct doesn't include prerelease strings - PSResourceInfo.Prerelease contains those.

This means that if I have:

• A locally-installed resource, with version 1.0.1-pre
• A remote repository resource, with version 1.0.1
• The same version number between the two (sans prerelease - i.e. the module's prerelease "graduated")
  ...then Update-PSResource will mistakenly mark the locally-installed version as "up to date".

JiraPS, which recently released 2.15.0 (having previously released 2.15.0-alpha1 in 2024, falls into this bucket.

This behavior needs a test. Publishing a test module to Gallery with a prerelease, then normal-release version (i.e. 1.0.1-pre and 1.0.1) would be enough to test this behavior.

If someone from the Gallery team can publish a test module, I'm happy to contribute a test to test\UpdatePSResourceTests\UpdatePSResourceV2.Tests.ps1 as part of this PR.

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