Provisioning: Add Connection resource (#115272)

* Provisioning: Add Connection resource

* adding some more integration tests

* updating openapi snapshot, linting

* generating FE code, fixing issue in unit tests

* addressing comments

* addressing comments

* adding more integration tests

* fixing rebase issues

* removing linting exception

* addressing comments: improving validation and tests

* adding Connection URL at mutation time, updating tests accordingly

* linting

apps/provisioning/pkg/connection/mutator.go

@@ -0,0 +1,28 @@
+package connection
+
+import (
+	"fmt"
+
+	provisioning "github.com/grafana/grafana/apps/provisioning/pkg/apis/provisioning/v0alpha1"
+)
+
+const (
+	githubInstallationURL = "https://github.com/settings/installations"
+)
+
+func MutateConnection(connection *provisioning.Connection) error {
+	switch connection.Spec.Type {
+	case provisioning.GithubConnectionType:
+		// Do nothing in case spec.Github is nil.
+		// If this field is required, we should fail at validation time.
+		if connection.Spec.GitHub == nil {
+			return nil
+		}
+
+		connection.Spec.URL = fmt.Sprintf("%s/%s", githubInstallationURL, connection.Spec.GitHub.InstallationID)
+		return nil
+	default:
+		// TODO: we need to setup the URL for bitbucket and gitlab.
+		return nil
+	}
+}