Add option WITH_BENCHMARK to disable building benchmarks

[ThomsonTan]

Changes

Please provide a brief description of the changes here.

For significant contributions please make sure you have completed the following items:

• CHANGELOG.md updated for non-trivial changes
• Unit tests have been added
• Changes in public API reviewed

[marcalff]

LGTM, and good idea.

[lalitb]

Thanks, can we also add the "benchmark" tag for Bazel, it will allow to disable building benchmark test for bazel too.

refer -

opentelemetry-cpp/api/test/trace/BUILD

Lines 8 to 12 in 6644ddd

	tags = [
	"api",
	"test",
	"trace",
	],

[codecov]

Codecov Report

Merging #1794 (d964558) into main (c1aa0b8) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1794   +/-   ##
=======================================
  Coverage   85.73%   85.73%           
=======================================
  Files         171      171           
  Lines        5240     5240           
=======================================
  Hits         4492     4492           
  Misses        748      748           

[lalitb]

Requesting similar changes for bazel as mentioned in comments :)

[ThomsonTan]

Requesting similar changes for bazel as mentioned in comments :)

Done the change.

[lalitb]

Thanks. Much needed change :)