feat(core): Add connection to optional remote ers #5771

Job	Run time
image build	1m 52s
go (examples)	1m 25s
integration tests	5m 52s
go (sdk)	1m 20s
go (service)	1m 26s
Protocol Buffer Lint and Gencode Up-to-date check	50s
go (lib/ocrypto)	1m 25s
go (lib/fixtures)	1m 18s
license check	49s
go (lib/flattening)	1m 23s
go (keycloak-entity-resolution)	1m 25s
otdfctl e2e tests	4m 42s
platform-xtest / cross-client-test	8m 12s
ci	1s
	32m 0s

Provide feedback