Add POC of GitHub Webhook Delivery Forwarder (#682)

* Add POC of GitHub Webhook Delivery Forwarder

* multi-forwarder and ctrl-c existing and fix for non-woring http post

* Rename source files

* Extract signal handling into a dedicated source file

* Faster ctrl-c handling

* Enable automatic creation of repo hook on startup

* Add support for forwarding org hook deliveries

* Set hook secret on hook creation via envvar (HOOK_SECRET)

* Fix org hook support

* Fix HOOK_SECRET for consistency

* Refactor to prepare for custom log position provider

* Refactor to extract inmemory log position provider

* Add configmap-based log position provider

* Rename githubwebhookdeliveryforwarder to hookdeliveryforwarder

* Refactor to rename LogPositionProvider to Checkpointer and extract ConfigMap checkpointer into a dedicated pkg

* Refactor to extract logger initialization

* Add hookdeliveryforwarder README and bump go-github to unreleased ver

github/fake/runners.go

@@ -8,7 +8,7 @@ import (
 
 	"github.com/actions-runner-controller/actions-runner-controller/api/v1alpha1"
 
-	"github.com/google/go-github/v36/github"
+	"github.com/google/go-github/v37/github"
 	"github.com/gorilla/mux"
 )
 

github/github.go

@@ -12,7 +12,7 @@ import (
 
 	"github.com/actions-runner-controller/actions-runner-controller/github/metrics"
 	"github.com/bradleyfalzon/ghinstallation"
-	"github.com/google/go-github/v36/github"
+	"github.com/google/go-github/v37/github"
 	"golang.org/x/oauth2"
 )
 

github/github_test.go

@@ -8,7 +8,7 @@ import (
 	"time"
 
 	"github.com/actions-runner-controller/actions-runner-controller/github/fake"
-	"github.com/google/go-github/v36/github"
+	"github.com/google/go-github/v37/github"
 )
 
 var server *httptest.Server