feat(core): programmatic setting of authz policy #6658

Job	Run time
Protocol Buffer Lint and Gencode Up-to-date check	21s
go (examples)	1m 6s
go (sdk)	1m 39s
image build	1m 35s
go (service)	1m 34s
go (lib/ocrypto)	38s
go (lib/fixtures)	36s
integration tests	4m 13s
go (lib/flattening)	32s
license check	1m 2s
otdfctl e2e tests	3m 55s
platform-xtest / cross-client-test	5m 29s
ci	1s
	22m 41s

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