feat(sdk)!: switch to `connect-rpc` for GRPC #989

Job	Run time
SonarCloud Scan	1m 56s
platform-integration	2m 49s
Validate PR title	4s
mavenverify	1m 19s
platform-xtest / resolve-versions	15s
platform-xtest / cross-client-test (main)	20m 34s
platform-xtest / cross-client-test (v0.4.26)	12m 42s
ci	1s
	39m 40s

Provide feedback