Add WDAC Audit mode logging as experimental feature

[PaulHigin]

PR Summary

This PR adds a new language mode and logging messages to PowerShell restrictions when run under Windows WDAC (Windows Defender Application Control) policy.

This addresses Issue #18628

PR Context

PowerShell enforces language mode and other restrictions when it detects it is running under a WDAC (or deprecated AppLocker) system polices (Windows platform only). The enforced restrictions can cause existing script (written without the restrictions in mind) to break in unpredictable ways.

WDAC can run in Audit mode where policy restriction instances are not enforced but logged. These changes updates PowerShell so that when WDAC is in Audit mode, it too logs when restrictions would apply if the policy was being enforced. This will help users to understand what restrictions will apply when their script runs in policy enforcement mode.

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): PSWDACAuditLogging
• User-facing changes
  • Not Applicable
  • OR
  • Documentation needed
    • Issue filed:
• Testing - New and feature
  • N/A or can only be tested interactively
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  • 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:

[SteveL-MSFT]

Doesn't have to be code fenced, but we should advertise this as an Experimental Feature in case we need to change the trace messages based on user feedback

[daxian-dbw]

(note to myself) need to take a closer look at this.

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This PR has 901 quantified lines of changes. In general, a change size of upto 200 lines is ideal for the best PR experience!

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Label      : Extra Large
Size       : +714 -187
Percentile : 96.7%

Total files changed: 56

Change summary by file extension:
.cs : +546 -187
.resx : +168 -0

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[daxian-dbw]

@PaulHigin I'm closing this one assuming it's superseded by #19641