CloudMigrations: Query Grafana Migration Status for status while the snapshot is in the cloud (#90314)

* implement querying gms for snapshot status

* add some documentation

* provide snapshot resources after snapshot is created

* add rate limiting to backend

* fix compilation error

* fix typo

* add unit tests

* finish merge

* lint

* swagger gen

* more testing

* remove duplicate test

* address a couple PR comments

* update switch statement to a map

* add timeouts to gms client through the http client

* remove extra whitespace

* put method back where it was so the PR is less confusing

* fix tests

* add todo

* fix final unit test

pkg/services/cloudmigration/gmsclient/gms_client_test.go

@@ -3,12 +3,31 @@ package gmsclient
 import (
 	"testing"
 
+	"github.com/grafana/grafana/pkg/setting"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func Test_buildBasePath(t *testing.T) {
 	t.Parallel()
 
+	// Domain is required
+	_, err := NewGMSClient(&setting.Cfg{
+		CloudMigration: setting.CloudMigrationSettings{
+			GMSDomain: "",
+		},
+	})
+	require.Error(t, err)
+
+	// Domain is required
+	c, err := NewGMSClient(&setting.Cfg{
+		CloudMigration: setting.CloudMigrationSettings{
+			GMSDomain: "non-empty",
+		},
+	})
+	require.NoError(t, err)
+	client := c.(*gmsClientImpl)
+
 	tests := []struct {
 		description string
 		domain      string
@@ -30,7 +49,8 @@ func Test_buildBasePath(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.description, func(t *testing.T) {
-			assert.Equal(t, tt.expected, buildBasePath(tt.domain, tt.clusterSlug))
+			client.cfg.CloudMigration.GMSDomain = tt.domain
+			assert.Equal(t, tt.expected, client.buildBasePath(tt.clusterSlug))
 		})
 	}
 }