Add otlp log extension methods for LoggerProviderBuilder

[vishweshbankwar]

Towards #4454
Fixes #4388

Changes

Adds the otlp log exporter extension methods LoggerProviderBuilder. Also, includes some fixes by @CodeBlanch for the issues surfaced during testing for LoggerProvider.

Usage Examples

// With OTel data model
using var provider = Sdk.CreateLoggerProviderBuilder()
    .AddOtlpExporter()
    .Build();

var otelLogger = provider.GetLogger();

otelLogger.EmitLog(new LogRecordData { Body = "Hello world " });

// With ILogger
var services = new ServiceCollection();

services.AddLogging(builder => builder.AddOpenTelemetry());
services.ConfigureOpenTelemetryLoggerProvider(builder => builder.AddOtlpExporter());

using var sp = services.BuildServiceProvider();

var loggerFactory = sp.GetService<ILoggerFactory>();

var iLogger = loggerFactory?.CreateLogger("MyILogger");
iLogger?.LogInformation("Hello ILogger");

// With named LogRecordExportProcessorOptions
var services = new ServiceCollection();
services.AddLogging(builder => builder.AddOpenTelemetry());
services.Configure<LogRecordExportProcessorOptions>("MyOtlpOptions", p => p.ExportProcessorType = ExportProcessorType.Simple);
services.ConfigureOpenTelemetryLoggerProvider(builder => builder.AddOtlpExporter(name: "MyOtlpOptions", configureExporterAndProcessor: null));

using var sp = services.BuildServiceProvider();

var loggerFactory = sp.GetService<ILoggerFactory>();

var iLogger = loggerFactory?.CreateLogger("MyILogger");
iLogger?.LogInformation("Hello ILogger");

TODO:
Add changelog and Readme

Merge requirement checklist

• CONTRIBUTING guidelines followed (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

Merging #4596 (f1f7de7) into main (2a228f9) will increase coverage by 1.63%.
The diff coverage is 98.60%.

❗ Current head f1f7de7 differs from pull request most recent head aac88aa. Consider uploading reports for the commit aac88aa to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4596      +/-   ##
==========================================
+ Coverage   83.61%   85.24%   +1.63%     
==========================================
  Files         296      314      +18     
  Lines       12484    12861     +377     
==========================================
+ Hits        10438    10963     +525     
+ Misses       2046     1898     -148     

Flag	Coverage Δ
unittests	?

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

Files	Coverage Δ
...lemetry.Extensions.Hosting/OpenTelemetryBuilder.cs	89.65% <100.00%> (ø)
...elemetry/Logs/Builder/LoggerProviderBuilderBase.cs	97.14% <100.00%> (+0.17%)	⬆️
...try/Logs/ILogger/OpenTelemetryLoggingExtensions.cs	100.00% <100.00%> (+5.88%)	⬆️
...lemetryProtocol/OtlpLogExporterHelperExtensions.cs	96.66% <98.07%> (+6.19%)	⬆️

... and 226 files with indirect coverage changes

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[CodeBlanch]

@vishweshbankwar

FYI I just pushed a commit to disable IHttpClientFactory integration for OtlpLogExporter.

There is a circular reference issue I haven't been able to figure out a way to make it work reliably. I figured best to just not support it for now.

See: dotnet/runtime#77312 (comment)

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Closed as inactive. Feel free to reopen if this PR is still being worked on.

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Closed as inactive. Feel free to reopen if this PR is still being worked on.