First commit working version, cleanup still to do

[jbedell-newrelic]

Updates to support the "nrns" header in message queues when the transaction is not selected for sampling. Also updates to support the otel autoconfigure use of span attributes for the same.

Resolves: #2888

[codecov-commenter]

Codecov Report

❌ Patch coverage is 11.11111% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.76%. Comparing base (edff1ac) to head (8c20655).
⚠️ Report is 10 commits behind head on main.

Files with missing lines	Patch %	Lines
.../src/main/java/com/newrelic/agent/HeadersUtil.java	6.25%	12 Missing and 3 partials ⚠️
...ewrelic/agent/config/DistributedTracingConfig.java	50.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2939      +/-   ##
============================================
- Coverage     70.78%   70.76%   -0.03%     
+ Complexity    10664    10661       -3     
============================================
  Files           879      877       -2     
  Lines         42971    42980       +9     
  Branches       6501     6505       +4     
============================================
- Hits          30419    30415       -4     
- Misses         9623     9628       +5     
- Partials       2929     2937       +8     

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