Bump google.golang.org/api from 0.201.0 to 0.203.0 in /gcp #314

Job	Run time
Test (stable)	33s
Test (oldstable)	45s
Test (otlp, stable)	50s
Test (otlp, oldstable)	57s
Test (gcp, stable)	1m 7s
Test (gcp, oldstable)	54s
Test (grpc, stable)	57s
Test (grpc, oldstable)	54s
Test (examples/grpc, stable)	1m 4s
Test (examples/grpc, oldstable)	1m 1s
Test (http, stable)	47s
Test (http, oldstable)	47s
Test (examples/http, stable)	1m 5s
Test (examples/http, oldstable)	1m 0s
All Tests	1s
	12m 42s

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