Restructure cloudmigration service (#83211)

* Restructure cloudmigation service

* Adjust codewoners and wire

* Comment out unused metrics

pkg/services/cloudmigration/api/api_test.go

@@ -0,0 +1,12 @@
+package api
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_OnlyEnabledForGrafanaAdmi(t *testing.T) {
+	// TODO: implement
+	assert.True(t, true)
+}