Bump google.golang.org/grpc from 1.60.0 to 1.60.1 in /internal/signalfx-agent #7308

Job	Run time
setup-environment	1m 47s
generate-metrics	31s
tidy	1m 0s
coverage	39s
cross-compile (binaries-darwin_amd64)	24s
gofmt	55s
lint	43s
cross-compile (binaries-darwin_arm64)	22s
test	27s
cross-compile (binaries-linux_amd64)	24s
cross-compile (binaries-linux_arm64)	23s
cross-compile (binaries-windows_amd64)	21s
cross-compile (binaries-linux_ppc64le)	25s
	8m 21s

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