*: git.monogon.dev -> source.monogon.dev

This implements T882, setting our (virtual) GOPATH to source.monogon.dev
for this repository.

Test Plan: Refactor, CI only.

X-Origin-Diff: phab/D686
GitOrigin-RevId: c5e2309089948ffc3a98e68e2e0e1cbb157d3a36
diff --git a/metropolis/node/kubernetes/reconciler/reconciler.go b/metropolis/node/kubernetes/reconciler/reconciler.go
index d44a5fe..51cc248 100644
--- a/metropolis/node/kubernetes/reconciler/reconciler.go
+++ b/metropolis/node/kubernetes/reconciler/reconciler.go
@@ -34,7 +34,7 @@
 	meta "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/client-go/kubernetes"
 
-	"git.monogon.dev/source/nexantic.git/metropolis/pkg/supervisor"
+	"source.monogon.dev/metropolis/pkg/supervisor"
 )
 
 // Sad workaround for all the pointer booleans in K8s specs