fix(deps): update dependency grpcio to v1.68.0 #2713

Job	Run time
Run CI / Check examples / Check examples	3m 31s
Run CI / Check NIMS / Check NIMS	1m 10s
Run CI / Check NIMG / Check NIMG	42s
Run CI / Run unit tests / Run unit tests (windows-latest, 3.8)	2m 53s
Run CI / Run unit tests / Run unit tests (windows-latest, 3.9)	2m 48s
Run CI / Run unit tests / Run unit tests (windows-latest, 3.10)	3m 9s
Run CI / Run unit tests / Run unit tests (windows-latest, 3.11)	2m 58s
Run CI / Run unit tests / Run unit tests (windows-latest, 3.12)	3m 23s
Run CI / Run unit tests / Run unit tests (ubuntu-latest, 3.8)	2m 14s
Run CI / Run unit tests / Run unit tests (ubuntu-latest, 3.9)	1m 58s
Run CI / Run unit tests / Run unit tests (ubuntu-latest, 3.10)	2m 6s
Run CI / Run unit tests / Run unit tests (ubuntu-latest, 3.11)	2m 6s
Run CI / Run unit tests / Run unit tests (ubuntu-latest, 3.12)	3m 4s
Run CI / Run system tests / Run system tests (py32)	43m 10s
Run CI / Run system tests / Run system tests (py64)	37m 15s
Run CI / Report test results / Report test results	19s
	1h 52m 46s

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