Implement sync disabled queue

[bogdandrutu]

This PR implements a version of a queue that can be used when users want to not have an async behavior and want to block until the request is send by the exporter.

This implementation is only used when batching is enabled, otherwise if both batching and queueing are disabled no queue or batch is configured.

Benchmark results:

goos: darwin
goarch: arm64
pkg: go.opentelemetry.io/collector/exporter/exporterqueue
cpu: Apple M2 Max
BenchmarkDisabledQueueOffer
BenchmarkDisabledQueueOffer-12    	 5839711	       187.5 ns/op	      24 B/op	       1 allocs/op

[codecov]

Codecov Report

Attention: Patch coverage is 94.23077% with 3 lines in your changes missing coverage. Please review.

Project coverage is 91.34%. Comparing base (677b87e) to head (a8f57a8).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
exporter/exporterqueue/queue.go	50.00%	2 Missing and 1 partial ⚠️

❌ Your patch status has failed because the patch coverage (94.23%) is below the target coverage (95.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12245      +/-   ##
==========================================
+ Coverage   91.31%   91.34%   +0.03%     
==========================================
  Files         465      467       +2     
  Lines       25586    25753     +167     
==========================================
+ Hits        23363    23525     +162     
- Misses       1806     1810       +4     
- Partials      417      418       +1     

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[dmitryax]

Please rebase

[dmitryax]

LGTM