feat(sdk)!: switch to `connect-rpc` for GRPC #987

Job	Run time
SonarCloud Scan	1m 44s
platform-integration	2m 54s
Validate PR title	2s
mavenverify	1m 21s
platform-xtest / resolve-versions	11s
platform-xtest / cross-client-test (main)	21m 5s
platform-xtest / cross-client-test (v0.4.26)	13m 2s
ci	1s
	40m 20s

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