[chore] Add e2e tests using grpc and generated protobuf stubs for pdata files#14087

bogdandrutu wants to merge 1 commit intoopen-telemetry:mainopen-telemetry/opentelemetry-collector:mainfrom

bogdandrutu:add-e2e-grpc-testsbogdandrutu/opentelemetry-collector:add-e2e-grpc-testsCopy head branch name to clipboard