Update grpc client enrich callbacks

[vishweshbankwar]

Towards #3495

Changes

The PR splits the enrich callback in to two different callbacks based on the object that can be used to enrich the activity.
Current State:

services.AddOpenTelemetryTracing((builder) =>
{
    builder
    .AddGrpcClientInstrumentation(opt => opt.Enrich
        = (activity, eventName, rawObject) =>
    {
        if (eventName.Equals("OnStartActivity"))
        {
            if (rawObject is HttpRequestMessage request)
            {
                activity.SetTag("requestVersion", request.Version);
            }
        }
    })
});

New State:

services.AddOpenTelemetryTracing((builder) =>
{
    builder
    .AddGrpcClientInstrumentation((options) =>
    {
        options.EnrichWithHttpRequestMessage = (activity, httpRequestMessage) =>
        {
            activity.SetTag("requestVersion", httpRequestMessage.Version);
        };
        options.EnrichWithHttpResponseMessage = (activity, httpResponseMessage) =>
        {
            activity.SetTag("responseVersion", httpResponseMessage.Version);
        };
    })

For significant contributions please make sure you have completed the following items:

• Appropriate CHANGELOG.md updated for non-trivial changes
• Design discussion issue #
• Changes in public API reviewed

[codecov]

Codecov Report

Merging #3804 (44af441) into main (7e44089) will decrease coverage by 0.04%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3804      +/-   ##
==========================================
- Coverage   87.49%   87.45%   -0.05%     
==========================================
  Files         280      280              
  Lines       10780    10781       +1     
==========================================
- Hits         9432     9428       -4     
- Misses       1348     1353       +5     

Impacted Files	Coverage Δ
....GrpcNetClient/GrpcClientInstrumentationOptions.cs	100.00% <100.00%> (ø)
...ent/Implementation/GrpcClientDiagnosticListener.cs	86.66% <100.00%> (ø)
...porter.OpenTelemetryProtocol/OtlpMetricExporter.cs	72.72% <0.00%> (-13.64%)	⬇️
...tation/OpenTelemetryProtocolExporterEventSource.cs	85.00% <0.00%> (-10.00%)	⬇️
...p/Implementation/HttpInstrumentationEventSource.cs	72.00% <0.00%> (-4.00%)	⬇️
...emetry.Api/Internal/OpenTelemetryApiEventSource.cs	73.52% <0.00%> (-2.95%)	⬇️
...Telemetry/Internal/SelfDiagnosticsEventListener.cs	97.65% <0.00%> (+0.78%)	⬆️
...Propagators/OpenTelemetryPropagatorsEventSource.cs	100.00% <0.00%> (+12.50%)	⬆️