Bump google.golang.org/grpc from 1.68.1 to 1.69.0 #9328

Job	Run time
cache-deps (linux)	37s
cache-deps (windows)	1m 38s
images (linux)	6m 50s
unit-test (ubuntu-22.04)	5m 27s
unit-test (macos-latest)	5m 11s
lint (linux)	5m 32s
unit-test (linux with race detection)	6m 46s
Build matrix	6s
unit-test (windows)	8m 28s
artifacts (windows)	5m 59s
lint (windows)	8m 40s
artifacts (linux)	0s
integration (linux)	0s
integration-k8s	0s
images (windows)	0s
integration (windows)	0s
success	0s
	55m 14s

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