chore(deps): bump google.golang.org/grpc from 1.67.1 to 1.68.0 #34785

Job	Run time
changes	15s
Ensure Go modules synchronicity	22s
Check changes to generated code	4m 39s
Build & cache Go code	3m 31s
Build, test & lint UI code	1m 35s
Lint Go code	22s
Run unit tests for Go packages	6m 46s
Run unit tests with -race for Go packages	9m 11s
Run end-to-end tests (v1.31.0, true)	50m 23s
Run end-to-end tests (v1.30.4, false)	51m 9s
Run end-to-end tests (v1.29.8, false)	50m 6s
Run end-to-end tests (v1.28.13, false)	50m 50s
E2E Tests - Composite result	1s
Process & analyze test artifacts	49s
	3h 49m 59s

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