Provisioning: Add Validation and Mutation for Connection resource (#115596)

* WIP: mutator added, start working on validator

* first validator iteration

* second validator iteration

* wip: working on integration tests

* re-working mutation and validation, using Connection interface

* fixing some rebase things

* fixing integration tests

* formatting

* fixing unit tests

* k8s codegen

* linting

* moving tests which are available only for enterprise

* addressing comments: using repo config for connections, updating tests

* addressing comments: adding some more info in the app and installation

* fixing app data

* addressing comments: updating connection implementation

* addressing comments

* formatting

* fixing tests

pkg/tests/apis/helper.go

@@ -14,6 +14,7 @@ import (
 	"testing"
 	"time"
 
+	githubConnection "github.com/grafana/grafana/apps/provisioning/pkg/connection/github"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"k8s.io/apimachinery/pkg/api/errors"
@@ -207,6 +208,10 @@ func (c *K8sTestHelper) GetEnv() server.TestEnv {
 	return c.env
 }
 
+func (c *K8sTestHelper) SetGithubConnectionFactory(f githubConnection.GithubFactory) {
+	c.env.GithubConnectionFactory = f
+}
+
 func (c *K8sTestHelper) GetListenerAddress() string {
 	return c.listenerAddress
 }