[Exporter.Geneva] Add TLDLogExporter

[utpilla]

Changes

• Add TLDLogExporter
• GenevaLogExporter to use TLDExporter when the user provides "PrivatePreviewEnableTraceLoggingDynamic=true" in the connectionString

TODOs:

• Use a single ThreadLocal instead of multiple
• Avoid potential unbounded memory usage for List<KeyValuePair<string, object>> keyValuePairs
• Add the support for prefix-based table name mapping added in [Geneva.Logs] Support prefix-based table name mapping #796

Setup and usage:

using var loggerFactory = LoggerFactory.Create(builder => builder
        .AddOpenTelemetry(loggerOptions =>
        {
            loggerOptions.IncludeScopes = true;
            loggerOptions.AddGenevaLogExporter(exporterOptions =>
            {
                exporterOptions.ConnectionString = "EtwSession=OpenTelemetry;PrivatePreviewEnableTraceLoggingDynamic=true";
                exporterOptions.PrepopulatedFields = new Dictionary<string, object>
                {
                    ["cloud.role"] = "BusyWorker",
                    ["cloud.roleInstance"] = "CY1SCH030021417",
                    ["cloud.roleVer"] = "9.0.15289.2",
                };
            });
        }));

        var logger = loggerFactory.CreateLogger<Program>();

        logger.LogInformation("Hello from {food} {price}.", "artichoke", 3.99);

You could us any ETW collection tools such as WPA, PerfView etc. to view the data:

Example with PerfView:
For the connectionString = "EtwSession=OpenTelemetry;PrivatePreviewEnableTraceLoggingDynamic=true", you can run the following command in Command Prompt:

PerfView.exe collect -MaxCollectSec:3600 -NoGui /onlyProviders=*OpenTelemetry

[codecov]

Codecov Report

Merging #874 (545c6ae) into main (cea38d3) will decrease coverage by 1.13%.
The diff coverage is 40.15%.

❗ Current head 545c6ae differs from pull request most recent head 50b19bd. Consider uploading reports for the commit 50b19bd to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #874      +/-   ##
==========================================
- Coverage   70.01%   68.87%   -1.14%     
==========================================
  Files         187      188       +1     
  Lines        6826     7081     +255     
==========================================
+ Hits         4779     4877      +98     
- Misses       2047     2204     +157     

Impacted Files	Coverage Δ
...etry.Exporter.Geneva/TLDExporter/TldLogExporter.cs	36.17% <36.17%> (ø)
...OpenTelemetry.Exporter.Geneva/GenevaLogExporter.cs	77.50% <79.16%> (-2.50%)	⬇️
...orter.Geneva/MsgPackExporter/MsgPackLogExporter.cs	93.36% <0.00%> (-0.83%)	⬇️

[reyang]

Why is this (trace) needed?

[utpilla]

It's not needed. I have removed it.