Block getting help from network locations in restricted remoting session

[TravisEz13]

PR Summary

Block getting help from network locations in restricted remoting session (JEA, exchange remoting, and similar custom remoting sessions)

PR Context

This was already released in the servicing releases.

This is mitigated if the restricted proxy is used for get-help or if the file system provider is hidden for the session, but not all customers implemented this way.

We have already documented that you should have these other protections in place to protect these scenarios:
https://learn.microsoft.com/en-us/powershell/scripting/dev-cross-plat/security/securing-restricted-sessions?view=powershell-7.3

Defense in depth security fix

Conflicts:

• src/System.Management.Automation/engine/Utils.cs
• test/tools/Modules/HelpersCommon/HelpersCommon.psd1
• test/tools/Modules/HelpersCommon/HelpersCommon.psm1

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
• This PR is ready to merge and is not Work in Progress.
  • If the PR is work in progress, please add the prefix WIP: or [ WIP ] to the beginning of the title (the WIP bot will keep its status check at Pending while the prefix is present) and remove the prefix when the PR is ready.
• Breaking changes
  • None
  • OR
  • Experimental feature(s) needed
    • Experimental feature name(s):
• User-facing changes
  • Not Applicable
  • OR
  • Documentation needed
    • Issue filed:
• Testing - New and feature
  • N/A or can only be tested interactively
  • OR
  • Make sure you've added a new test if existing tests do not effectively test the code changed
• Tooling
  • I have considered the user experience from a tooling perspective and don't believe tooling will be impacted.
  • OR
  • I have considered the user experience from a tooling perspective and opened an issue in the relevant tool repository. This may include:
    • Impact on PowerShell Editor Services which is used in the PowerShell extension for VSCode
      (which runs in a different PS Host).
      • Issue filed:
    • Impact on Completions (both in the console and in editors) - one of PowerShell's most powerful features.
      • Issue filed:
    • Impact on PSScriptAnalyzer (which provides linting & formatting in the editor extensions).
      • Issue filed:
    • Impact on EditorSyntax (which provides syntax highlighting with in VSCode, GitHub, and many other editors).
      • Issue filed:

[pull-request-quantifier-deprecated]

This PR has 123 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      : Medium
Size       : +110 -13
Percentile : 44.6%

Total files changed: 9

Change summary by file extension:
.cs : +15 -13
.resx : +3 -0
.ps1 : +30 -0
.psd1 : +1 -0
.psm1 : +61 -0

Change counts above are quantified counts, based on the PullRequestQuantifier customizations.

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How to interpret the change counts in git diff output

• One line was added: +1 -0
• One line was deleted: +0 -1
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  interpret that line like one addition plus one deletion)
• Change percentiles: Change characteristics (addition, deletion, modification)
  of this PR in relation to all other PRs within the repository.

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[TravisEz13]

This had a merge conflict, I could not find a good reason why.

[TravisEz13]

This had a merge conflict because this branch has new changes.

[TravisEz13]

This had a merge conflict because this branch has new changes.