[StackExchangeRedis] Support Sdk.SuppressInstrumentation.

[pengweiqhca]

Fixes #3371
Design discussion issue #

Changes

Merge requirement checklist

• CONTRIBUTING guidelines followed (license requirements, nullable enabled, static analysis, etc.)
• Unit tests added/updated
• Appropriate CHANGELOG.md files updated for non-trivial changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.92%. Comparing base (ab01922) to head (0d70b9e).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3372      +/-   ##
==========================================
+ Coverage   70.78%   70.92%   +0.14%     
==========================================
  Files         440      430      -10     
  Lines       17245    17194      -51     
==========================================
- Hits        12207    12195      -12     
+ Misses       5038     4999      -39     

Flag	Coverage Δ
unittests-Instrumentation.Cassandra	?
unittests-Instrumentation.StackExchangeRedis	71.80% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...dis/StackExchangeRedisConnectionInstrumentation.cs	95.83% <100.00%> (ø)

... and 10 files with indirect coverage changes

🚀 New features to boost your workflow:

• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[Kielek]

I am concerned about this change. During stabilization effort, this package was removed (at least from HttpClient). We still do not have good solution to make similar things referencing only OpenTelemetry/Api package.

@open-telemetry/dotnet-maintainers, do you see any better option here (even long term, by adding this functionality on API level)?

[matt-hensley]

Brought this up at the .NET SIG on Nov 4 2025. Maintainers are looking at moving this functionality out of the SDK package.

Suppression is not currently part of the spec but is useful enough to find a better solution, even though it would technically make the API out of compliance.