Bump google.golang.org/grpc from 1.50.0 to 1.60.0 in /pdata #305

Job	Run time
setup-environment	1m 10s
checks	14s
unittest (1.19)	49s
test-coverage	47s
unittest (1.18)	1m 1s
lint	21s
cross-build-collector (darwin, amd64)	14s
cross-build-collector (darwin, arm64)	13s
cross-build-collector (linux, 386)	8s
cross-build-collector (linux, amd64)	15s
cross-build-collector (linux, arm64)	15s
cross-build-collector (linux, ppc64le)	9s
cross-build-collector (linux, arm)	12s
cross-build-collector (windows, 386)	12s
cross-build-collector (windows, amd64)	11s
	6m 11s

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