Test

Bump google.golang.org/api from 0.188.0 to 0.189.0 in /gcp #244

Job	Run time
Test (stable)	33s
Test (http, stable)	54s
Test (oldstable)	33s
Test (examples/http, stable)	59s
Test (otlp, stable)	49s
Test (otlp, oldstable)	52s
Test (gcp, stable)	1m 5s
Test (gcp, oldstable)	1m 2s
Test (grpc, stable)	52s
Test (grpc, oldstable)	57s
Test (examples/grpc, stable)	59s
Test (examples/grpc, oldstable)	1m 0s
All Tests	1s
	10m 36s

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