[chore] update gensemconv to use .tools #15988

Job	Run time
govulncheck	30s
setup-environment	15s
lint	3m 11s
test-coverage	2m 25s
cross-build-collector (darwin, amd64)	41s
checks	1m 44s
cross-build-collector (darwin, arm64)	48s
unittest-matrix (~1.21.5)	1m 36s
cross-build-collector (linux, 386)	41s
unittest-matrix (~1.20.12)	1m 11s
cross-build-collector (linux, amd64)	46s
cross-build-collector (linux, arm64)	43s
cross-build-collector (linux, ppc64le)	44s
cross-build-collector (linux, arm, 7)	41s
cross-build-collector (linux, s390x)	40s
cross-build-collector (windows, 386)	42s
cross-build-collector (windows, amd64)	43s
unittest	1s
	18m 2s

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