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

apps/provisioning/pkg/connection/github/extra.go

@@ -0,0 +1,36 @@
+package github
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/grafana/grafana-app-sdk/logging"
+	provisioning "github.com/grafana/grafana/apps/provisioning/pkg/apis/provisioning/v0alpha1"
+	"github.com/grafana/grafana/apps/provisioning/pkg/connection"
+)
+
+type extra struct {
+	factory GithubFactory
+}
+
+func (e *extra) Type() provisioning.ConnectionType {
+	return provisioning.GithubConnectionType
+}
+
+func (e *extra) Build(ctx context.Context, connection *provisioning.Connection) (connection.Connection, error) {
+	logger := logging.FromContext(ctx)
+	if connection == nil || connection.Spec.GitHub == nil {
+		logger.Error("connection is nil or github info is nil")
+
+		return nil, fmt.Errorf("invalid github connection")
+	}
+
+	c := NewConnection(connection, e.factory)
+	return &c, nil
+}
+
+func Extra(factory GithubFactory) connection.Extra {
+	return &extra{
+		factory: factory,
+	}
+}