Add SimpleLogProcessor

[jack-berg]

As I was prototyping a Log4j2 OpenTelemetryAppender, I found testing inconvenient without a SimpleLogProcessor.

The primary use case of SimpleSpanProcessor is to use with the logging exporters. Logs won't have that use case as often, since application logs may be fed through the span processor, resulting in a cycle if they're logged out again. However I still think its useful to have this for: 1. testing. 2. for use cases where applications use the logging sdk to record things that are closer to "events" than application logs.

[codecov]

Codecov Report

Merging #3749 (76edecb) into main (9b9dcf9) will increase coverage by 0.06%.
The diff coverage is 82.85%.

@@             Coverage Diff              @@
##               main    #3749      +/-   ##
============================================
+ Coverage     89.21%   89.27%   +0.06%     
- Complexity     3877     3889      +12     
============================================
  Files           464      465       +1     
  Lines         12136    12171      +35     
  Branches       1189     1190       +1     
============================================
+ Hits          10827    10866      +39     
+ Misses          916      913       -3     
+ Partials        393      392       -1     

Impacted Files	Coverage Δ
...ntelemetry/sdk/logs/export/SimpleLogProcessor.java	82.85% <82.85%> (ø)
...telemetry/sdk/trace/export/BatchSpanProcessor.java	90.78% <0.00%> (+0.70%)	⬆️
...ntelemetry/sdk/extension/resources/OsResource.java	90.69% <0.00%> (+4.65%)	⬆️
...ava/io/opentelemetry/sdk/internal/RateLimiter.java	100.00% <0.00%> (+5.88%)	⬆️
...metry/sdk/extension/resources/ProcessResource.java	87.50% <0.00%> (+6.25%)	⬆️
...elemetry/sdk/extension/resources/HostResource.java	92.30% <0.00%> (+15.38%)	⬆️
...dk/extension/resources/ProcessRuntimeResource.java	100.00% <0.00%> (+16.66%)	⬆️

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