fix(o11y): create noop tracer when artifact ID is not set #339

Job	Run time
filter	1m 19s
build(25) except self-service clients	12m 17s
build(8) for showcase	9m 18s
build(8) for gapic-generator-java	11m 14s
dependency_analyzer_unit_test	1m 38s
unmanaged_dependency_check	9m 9s
showcase (25)	10m 10s
showcase (17)	9m 37s
build (17)	13m 49s
build(21) except self-service clients	11m 55s
build (11)	14m 4s
showcase-clirr	4m 52s
gapic-generator-java-bom	2m 37s
showcase (21)	9m 27s
showcase (11)	10m 5s
build(8) except for gapic-generator-java	4m 0s
	2h 15m 31s

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