Fix share completion with provider and spaces

[MartinGC94]

PR Summary

Stops the regex pattern for fileshares from (incorrectly) finding Windows device paths.
Makes the list item/tooltip text for fileshare completions consistent with normal path completion behavior.
Fixes tab completion for share names when specifying the filesystem provider like this: Microsoft.PowerShell.Core\FileSystem::\\localhost\<Tab> previously you would get no results.

Also fixes tab completion for file shares which are currently not quoted as they should when they contain spaces.
I have a question about adding a test share for this scenario. Can I just do it? Do I need to do anything special with the share ACL?

PR Context

Fixes #7569
Fixes #10002

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    • Impact on PSScriptAnalyzer (which provides linting & formatting in the editor extensions).
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[ghost]

This pull request has been automatically marked as Review Needed because it has been there has not been any activity for 7 days.
Maintainer, please provide feedback and/or mark it as Waiting on Author

[SteveL-MSFT]

Since your regex explicit avoids device paths, should have a test for that.

[MartinGC94]

I couldn't test it because the wildcard globbing was broken (see: #19442 ) but now that it has been fixed, I'll add the test.

-Edit: Nope, still broken. Not sure how to add a test for it until the rest of the code supports tab completion of device paths.

[ghost]

This pull request has been automatically marked as Review Needed because it has been there has not been any activity for 7 days.
Maintainer, please provide feedback and/or mark it as Waiting on Author

[pull-request-quantifier-deprecated]

This PR has 26 quantified lines of changes. In general, a change size of upto 200 lines is ideal for the best PR experience!

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Quantification details

Label      : Extra Small
Size       : +19 -7
Percentile : 10.4%

Total files changed: 2

Change summary by file extension:
.cs : +16 -7
.ps1 : +3 -0

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[JamesWTruher]

The @PowerShell/wg-powershell-engine discussed this and believe this change to be proper from a behavioral perspective.