refactor: improve logging messages and update configuration constants

- Updated logging messages in GrpcClient to provide clearer context, changing "ready" to "client is now ready" and "stopped" to "client has stopped".
- Refactored test setup in runner_test.go to remove unnecessary error checks during gRPC client start for cleaner code.
- Renamed GetDependencySetupScriptRoot to GetInstallRoot and updated related constants for better clarity and consistency in configuration management.

core/task/handler/runner_test.go

@@ -36,7 +36,7 @@ func setupGrpc(t *testing.T) {
 	require.Nil(t, err)
 
 	// Start a gRPC client
-	err = client.GetGrpcClient().Start()
+	client.GetGrpcClient().Start()
 	require.Nil(t, err)
 
 	// Cleanup