Remove uneecessary :exporter:otlp:common dependencies

[jack-berg]

:expoter:otlp:common is a shared dependencies used by :exporter:logging-otlp and :exporter:otlp:all. It primarily holds the custom serializers for converting data records into OTLP protobuf binary and json. Until recently, it was also a place for shared OTLP code between exporter:otlp:logs and :exporter:otlp:all, which included OTLP user agent stuff and common config stuff for the SPI providers. Now that there's no more :expoter:otlp:logs artifact, this shared code should be rolled into :exporter:otlp:all, allowing :exporter:otlp:common to drop its dependency on okhttp.

This means that :exporter:logging-otlp will no longer has an erroneous dependency on okhttp.

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (f89fc05) 91.38% compared to head (011ba1c) 91.39%.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #5535   +/-   ##
=========================================
  Coverage     91.38%   91.39%           
+ Complexity     4959     4957    -2     
=========================================
  Files           549      549           
  Lines         14563    14556    -7     
  Branches       1356     1356           
=========================================
- Hits          13308    13303    -5     
+ Misses          868      866    -2     
  Partials        387      387           

Impacted Files	Coverage Δ
...lp/http/logs/OtlpHttpLogRecordExporterBuilder.java	90.00% <ø> (ø)
...lp/http/metrics/OtlpHttpMetricExporterBuilder.java	95.23% <ø> (ø)
...r/otlp/http/trace/OtlpHttpSpanExporterBuilder.java	90.00% <ø> (ø)
...lemetry/exporter/otlp/internal/OtlpConfigUtil.java	89.84% <ø> (ø)
...r/otlp/internal/OtlpLogRecordExporterProvider.java	100.00% <ø> (ø)
...rter/otlp/internal/OtlpMetricExporterProvider.java	100.00% <ø> (ø)
...porter/otlp/internal/OtlpSpanExporterProvider.java	100.00% <ø> (ø)
...elemetry/exporter/otlp/internal/OtlpUserAgent.java	100.00% <ø> (ø)
...er/otlp/logs/OtlpGrpcLogRecordExporterBuilder.java	91.66% <ø> (ø)
...er/otlp/metrics/OtlpGrpcMetricExporterBuilder.java	100.00% <ø> (ø)
... and 1 more

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