Public setter for MetricReaderOptions.PeriodicExportingMetricReaderOptions

[alanwest]

#2620 (comment)

[codecov]

Codecov Report

Merging #3184 (162650b) into main (c926c02) will increase coverage by 0.28%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #3184      +/-   ##
==========================================
+ Coverage   84.87%   85.16%   +0.28%     
==========================================
  Files         259      259              
  Lines        9330     9330              
==========================================
+ Hits         7919     7946      +27     
+ Misses       1411     1384      -27     

Impacted Files	Coverage Δ
...ry/Internal/PeriodicExportingMetricReaderHelper.cs	100.00% <100.00%> (ø)
src/OpenTelemetry/Metrics/MetricReaderOptions.cs	100.00% <100.00%> (ø)
...emetry.Api/Internal/OpenTelemetryApiEventSource.cs	79.41% <0.00%> (-2.95%)	⬇️
...metryProtocol/Implementation/ActivityExtensions.cs	91.44% <0.00%> (+2.70%)	⬆️
...nTelemetryProtocol/OtlpMetricExporterExtensions.cs	82.14% <0.00%> (+14.28%)	⬆️
...xporter.OpenTelemetryProtocol/OtlpTraceExporter.cs	77.27% <0.00%> (+18.18%)	⬆️
...mentation/ExportClient/BaseOtlpGrpcExportClient.cs	83.33% <0.00%> (+22.22%)	⬆️
...entation/ExportClient/OtlpGrpcTraceExportClient.cs	78.57% <0.00%> (+28.57%)	⬆️
...tation/ExportClient/OtlpGrpcMetricsExportClient.cs	78.57% <0.00%> (+42.85%)	⬆️

[alanwest]

Might have a flakey Prometheus test

From this run:

[xUnit.net 00:00:00.94]     OpenTelemetry.Exporter.Prometheus.Tests.PrometheusExporterHttpServerTests.PrometheusExporterHttpServerIntegration_NoMetrics [FAIL]
[xUnit.net 00:00:00.95]       System.Net.Http.HttpRequestException : Connection refused
[xUnit.net 00:00:00.95]       ---- System.Net.Sockets.SocketException : Connection refused
[xUnit.net 00:00:00.95]       Stack Trace:
[xUnit.net 00:00:00.95]            at System.Net.Http.ConnectHelper.ConnectAsync(String host, Int32 port, CancellationToken cancellationToken)
[xUnit.net 00:00:00.95]            at System.Net.Http.HttpConnectionPool.ConnectAsync(HttpRequestMessage request, Boolean allowHttp2, CancellationToken cancellationToken)
[xUnit.net 00:00:00.95]            at System.Net.Http.HttpConnectionPool.CreateHttp11ConnectionAsync(HttpRequestMessage request, CancellationToken cancellationToken)
[xUnit.net 00:00:00.95]            at System.Net.Http.HttpConnectionPool.GetHttpConnectionAsync(HttpRequestMessage request, CancellationToken cancellationToken)
[xUnit.net 00:00:00.95]            at System.Net.Http.HttpConnectionPool.SendWithRetryAsync(HttpRequestMessage request, Boolean doRequestAuth, CancellationToken cancellationToken)
[xUnit.net 00:00:00.95]            at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
[xUnit.net 00:00:00.95]            at System.Net.Http.HttpClient.FinishSendAsyncBuffered(Task`1 sendTask, HttpRequestMessage request, CancellationTokenSource cts, Boolean disposeCts)
[xUnit.net 00:00:00.95]         /home/runner/work/opentelemetry-dotnet/opentelemetry-dotnet/test/OpenTelemetry.Exporter.Prometheus.Tests/PrometheusExporterHttpServerTests.cs(159,0): at OpenTelemetry.Exporter.Prometheus.Tests.PrometheusExporterHttpServerTests.RunPrometheusExporterHttpServerIntegrationTest(Boolean skipMetrics)
[xUnit.net 00:00:00.95]         /home/runner/work/opentelemetry-dotnet/opentelemetry-dotnet/test/OpenTelemetry.Exporter.Prometheus.Tests/PrometheusExporterHttpServerTests.cs(42,0): at OpenTelemetry.Exporter.Prometheus.Tests.PrometheusExporterHttpServerTests.PrometheusExporterHttpServerIntegration_NoMetrics()
[xUnit.net 00:00:00.95]         --- End of stack trace from previous location where exception was thrown ---
[xUnit.net 00:00:00.95]         ----- Inner Stack Trace -----
[xUnit.net 00:00:00.95]            at System.Net.Http.ConnectHelper.ConnectAsync(String host, Int32 port, CancellationToken cancellationToken)
  Failed OpenTelemetry.Exporter.Prometheus.Tests.PrometheusExporterHttpServerTests.PrometheusExporterHttpServerIntegration_NoMetrics [25 ms]

[cijothomas]

a changelog is important as this is going to be stable release in a day!

[CodeBlanch]

LGTM