api: remove dependency on proto-public, protobuf, and grpc #17869

Job	Run time
noop	1s
Get files changed and conditionally skip CI	7s
get-go-version / Determine Go toolchain version	8s
Setup	1s
check-generated-protobuf	1s
check-go-mod	1s
check-codegen	1s
dev-build	1s
lint	1s
lint-32bit	1s
lint-consul-retry	1s
lint-container-test-deps	1s
lint-enums	1s
go-test-ce	1s
go-test-enterprise	1s
go-test-32bit	1s
go-test-envoyextensions	1s
go-test-race	1s
go-test-api	1s
go-test-api-${{ needs.get-go-version.outputs.go-version-previous }}	1s
go-test-sdk	1s
go-test-sdk-${{ needs.get-go-version.outputs.go-version-previous }}	1s
go-test-testing-deployer	1s
go-test-troubleshoot	1s
	37s

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