Refactor grpc conversion into a submodule (#20) #14

Job	Run time
Check docs for ni.datastore / Check docs for ni.datastore	30s
Check analyzers for ni.datastore / Check analyzers for ni.datastore	52s
Run unit tests (ubuntu-latest, 3.10) / Run unit tests for ni.datastore with 3.10 on ubuntu-latest	20s
Run unit tests (ubuntu-latest, 3.12) / Run unit tests for ni.datastore with 3.12 on ubuntu-latest	19s
Run unit tests (ubuntu-latest, 3.13) / Run unit tests for ni.datastore with 3.13 on ubuntu-latest	18s
Run unit tests (windows-latest, 3.10) / Run unit tests for ni.datastore with 3.10 on windows-latest	43s
Run unit tests (windows-latest, 3.9) / Run unit tests for ni.datastore with 3.9 on windows-latest	1m 3s
Run unit tests (windows-latest, 3.11) / Run unit tests for ni.datastore with 3.11 on windows-latest	44s
Run unit tests (ubuntu-latest, 3.11) / Run unit tests for ni.datastore with 3.11 on ubuntu-latest	14s
Run unit tests (windows-latest, 3.13) / Run unit tests for ni.datastore with 3.13 on windows-latest	45s
Run unit tests (windows-latest, 3.12) / Run unit tests for ni.datastore with 3.12 on windows-latest	1m 13s
Run unit tests (ubuntu-latest, 3.9) / Run unit tests for ni.datastore with 3.9 on ubuntu-latest	22s
	7m 23s

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