[Extensions] Use exception helper

[martincostello]

Relates to #4127.

Changes

Use ArgumentOutOfRangeException.ThrowIfLessThanOrEqual on .NET.

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 72.85%. Comparing base (9d8a364) to head (31a713c).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4134      +/-   ##
==========================================
+ Coverage   72.77%   72.85%   +0.07%     
==========================================
  Files         469      461       -8     
  Lines       18272    18206      -66     
==========================================
- Hits        13298    13264      -34     
+ Misses       4974     4942      -32     

Flag	Coverage Δ
unittests-Extensions	90.78% <100.00%> (+0.04%)	⬆️
unittests-Instrumentation.Cassandra	?

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

Files with missing lines	Coverage Δ
...nTelemetry.Extensions/Trace/RateLimitingSampler.cs	100.00% <100.00%> (ø)

... and 13 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.

[Copilot]

Pull request overview

This PR refactors RateLimitingSampler argument validation in OpenTelemetry.Extensions to use the built-in .NET exception helper API (ArgumentOutOfRangeException.ThrowIfLessThanOrEqual) when targeting modern .NET, while retaining the existing fallback for older TFMs.

Changes:

• Use ArgumentOutOfRangeException.ThrowIfLessThanOrEqual under #if NET for maxTracesPerSecond validation.
• Keep the existing if (...) throw ... path for non-NET targets.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.