fix: dont optimize out benches #173

Job	Run time
tests	14s
cmake-integration-tests (instrumentation, ubuntu-latest)	1m 33s
bazel-integration-tests (instrumentation, ubuntu-latest)	1m 15s
bazel-integration-tests (walltime, codspeed-macro)	1m 21s
cmake-integration-tests (off, ubuntu-latest)	58s
cmake-integration-tests (walltime, codspeed-macro)	2m 4s
windows-bazel-build (walltime)	51s
bazel-integration-tests (off, ubuntu-latest)	18s
windows-cmake-build (walltime)	2m 6s
windows-cmake-build (off)	1m 50s
windows-bazel-build (off)	1m 14s
	13m 44s

Provide feedback