[Rebase & FF] AdvLoggerPkg: Modify AdvancedLoggerMmCore Library

[VivianNK]

Description

Make the following changes:

• Include PiMm.h for EFI_MM_SYSTEM_TABLE definition
• Moved DEBUG statement that could previously dereference a NULL pointer.
• Make 'initialized' a global variable to match other library implementations and to be accessible for unit testing.
• Change __FUNCTION__ to __func__
• Add "MmCore" to the debug messages for easier identification
• Add Version check in ValidateInfoBlock. The signature tells us we have the right structure, the version may be different if this MMCore instance is sharing a log buffer with DXE that thinks it is different, etc.

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• Impacts functionality?
• Impacts security?
• Breaking change?
• Includes tests?
• Includes documentation?

How This Was Tested

CI and Google Test

Integration Instructions

N/A

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.

Project coverage is 11.33%. Comparing base (ab7c17d) to head (6d330a1).

Files with missing lines	Patch %	Lines
...brary/AdvancedLoggerLib/MmCore/AdvancedLoggerLib.c	0.00%	7 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff               @@
##           dev/202405     #582      +/-   ##
==============================================
- Coverage       11.33%   11.33%   -0.01%     
==============================================
  Files             145      145              
  Lines           21931    21934       +3     
  Branches         2529     2529              
==============================================
  Hits             2486     2486              
- Misses          19411    19414       +3     
  Partials           34       34              

Flag	Coverage Δ
AdvLoggerPkg	5.61% <0.00%> (-0.01%)	⬇️

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