feat(sdk)!: switch to `connect-rpc` for GRPC #955

Job	Run time
Validate PR title	3s
SonarCloud Scan	2m 7s
mavenverify	1m 17s
platform-integration	3m 11s
platform-xtest / resolve-versions	11s
platform-xtest / cross-client-test (main)	13m 53s
platform-xtest / cross-client-test (v0.4.26)	12m 48s
ci	1s
	33m 31s

Provide feedback