Add instrument advisory API to "Stable" Metrics SDK

[JustasL]

Fixes this issue: #671

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: JustasL (1c3834a, 8a474b0, 6b95351, 0d7bae4)
• ✅ login: bryce-b / name: Bryce Buchanan (c484ce4, 84b2a77, 49b289f)

[JustasL]

@bryce-b does my changes need any kind of modification? Are they aligned with general project structure?

[codecov]

Codecov Report

Attention: Patch coverage is 60.00000% with 12 lines in your changes missing coverage. Please review.

Project coverage is 68.28%. Comparing base (7bad8ae) to head (49b289f).
Report is 123 commits behind head on main.

Files with missing lines	Patch %	Lines
...lemetryApi/Metrics/Stable/DefaultStableMeter.swift	0.00%	6 Missing ⚠️
.../Metrics/Stable/LongHistogramMeterBuilderSdk.swift	0.00%	4 Missing ⚠️
...metrySdk/Metrics/Stable/InstrumentDescriptor.swift	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #793      +/-   ##
==========================================
+ Coverage   67.89%   68.28%   +0.38%     
==========================================
  Files         344      327      -17     
  Lines       15169    14652     -517     
==========================================
- Hits        10299    10005     -294     
+ Misses       4870     4647     -223     

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