Stdout exporter for span and metrics

[zeitlinger]

Follow up to #6675

[codecov]

Codecov Report

Attention: Patch coverage is 93.40102% with 13 lines in your changes missing coverage. Please review.

Project coverage is 90.11%. Comparing base (7f8fbc9) to head (dbc35fa).
Report is 13 commits behind head on main.

Files with missing lines	Patch %	Lines
...lemetry/exporter/internal/ExporterBuilderUtil.java	79.06%	6 Missing and 3 partials ⚠️
...tlp/internal/metrics/OtlpStdoutMetricExporter.java	93.54%	1 Missing and 1 partial ⚠️
...g/otlp/internal/traces/OtlpStdoutSpanExporter.java	92.59%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #6750      +/-   ##
============================================
+ Coverage     90.03%   90.11%   +0.07%     
- Complexity     6475     6521      +46     
============================================
  Files           718      726       +8     
  Lines         19573    19669      +96     
  Branches       1931     1935       +4     
============================================
+ Hits          17622    17724     +102     
+ Misses         1353     1346       -7     
- Partials        598      599       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[zeitlinger]

@jack-berg here's the PR that brings metrics and spans to the same level as logs were before

memory mode will be the final PR