ParentBasedSampler should not explicitly consider Links

[mbakalov]

Fixes #1846.

Changes

Previously we had functionality in ParentBasedSampler that would consider activity links and return RecordAndSample if one of the links was sampled. This isn't according to the spec and is removed in this PR.

In a related PR we've added customization capability to ParentBasedSampler that can be used to examine links if needed.

• CHANGELOG.md updated for non-trivial changes

[mbakalov]

Just waiting for the related PR to get merged before making changes to the actual sampler.

[codecov]

Codecov Report

Merging #1851 (255ddc7) into main (cb066cb) will decrease coverage by 0.48%.
The diff coverage is 78.36%.

@@            Coverage Diff             @@
##             main    #1851      +/-   ##
==========================================
- Coverage   83.77%   83.29%   -0.49%     
==========================================
  Files         187      189       +2     
  Lines        5967     6123     +156     
==========================================
+ Hits         4999     5100     +101     
- Misses        968     1023      +55     

Impacted Files	Coverage Δ
src/OpenTelemetry/Logs/OpenTelemetryLogger.cs	26.82% <20.54%> (-44.60%)	⬇️
src/OpenTelemetry/Logs/LogRecord.cs	82.50% <77.77%> (-5.00%)	⬇️
.../OpenTelemetry/Logs/OpenTelemetryLoggerProvider.cs	77.55% <88.23%> (+7.09%)	⬆️
...rc/OpenTelemetry/Trace/TracerProviderBuilderSdk.cs	88.46% <88.88%> (-2.28%)	⬇️
src/OpenTelemetry/Trace/ExceptionProcessor.cs	90.90% <90.90%> (ø)
src/OpenTelemetry/Trace/TracerProviderSdk.cs	95.16% <98.64%> (+4.38%)	⬆️
...metryProtocol/Implementation/ActivityExtensions.cs	86.89% <100.00%> (+0.05%)	⬆️
...ry.Instrumentation.AspNet/AspNetInstrumentation.cs	100.00% <100.00%> (ø)
...umentation.AspNet/Implementation/HttpInListener.cs	89.10% <100.00%> (ø)
...entation.AspNet/TracerProviderBuilderExtensions.cs	100.00% <100.00%> (ø)
... and 24 more

[reyang]

LGTM.

[cijothomas]

@mbakalov thanks! please resolve conflict and we are good to merge.

[mbakalov]

@mbakalov thanks! please resolve conflict and we are good to merge.

Thanks @cijothomas - done now!