MmSupervisorPkg: Add MmSupervisorRing3Performance

[makubacki]

Description

Closes #383

Adds a new MM_STANDALONE driver that is used to link against a
PerformanceLib core instance for MM user mode drivers.

An empty driver is reserved for this use case for the following
reasons:

1. Make integration and debug obvious and easy by having a clearly
   named and designated driver for this purpose.
2. To be among the first MM user mode drivers dispatched to install
   the performance protocol and make the performance service
   available to other user mode drivers as early as possible.
3. To avoid linking directly to MmSupervisorRing3Broker. The MM
   Core performance library instance code has functionality that
   depends on MM services to be available. Since the Ring 3 Broker
   is reponsible for initializing MM services in user mode, it is
   complicated and error prone to attempt to defer using those
   services to install the performance protocol until syscall has
   been set up with the core and a proper gMmst global could be
   used by the common MM code. This is all much simpler and easier
   to integrate in a separate MM user mode driver.
4. To avoid linking the library to a pre-existing MM module that
   may have an unknown number of depdencies in its DEPEX. Since
   the DEPEX on a given platform aggregates all of the dependencies
   in linked libraries, it is not safe to assume any given MM module
   not dedicated exclusively for this purpose will not have unrelated
   dependencies that unnecessarily prolong installation of the
   performance protocol.

---

Temporarily includes this commit:

TEMP - .pytool/CISettings.py: Use Mu Basecore Standalone MM Perf Branch

Temporarily use this branch for testing.

This commit will be reverted after the following Mu Basecore PR is
merged:

microsoft/mu_basecore#1268

---

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

How This Was Tested

• Use MmSupervisorRing3Performance to retrieve MM performance records
  with the MM Supervisor on Q35.

Integration Instructions

• Included in MmSupervisorPkg/Docs/PlatformIntegration/PlatformIntegrationSteps.md

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.

Project coverage is 0.50%. Comparing base (589e3e8) to head (3289d42).

Files with missing lines	Patch %	Lines
...sorRing3Performance/MmSupervisorRing3Performance.c	0.00%	9 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##            main    #390      +/-   ##
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- Coverage   0.50%   0.50%   -0.01%     
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  Files        142     143       +1     
  Lines      20604   20613       +9     
  Branches      60      60              
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  Hits         105     105              
- Misses     20494   20503       +9     
  Partials       5       5              

Flag	Coverage Δ
MmSupervisorPkg	0.50% <0.00%> (-0.01%)	⬇️

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