*: 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/test/nanoswitch/nanoswitch.go b/metropolis/test/nanoswitch/nanoswitch.go
index 91d270b..3ab662b 100644
--- a/metropolis/test/nanoswitch/nanoswitch.go
+++ b/metropolis/test/nanoswitch/nanoswitch.go
@@ -38,12 +38,12 @@
 	"github.com/vishvananda/netlink"
 	"golang.org/x/sys/unix"
 
-	common "git.monogon.dev/source/nexantic.git/metropolis/node"
-	"git.monogon.dev/source/nexantic.git/metropolis/node/core/network/dhcp4c"
-	dhcpcb "git.monogon.dev/source/nexantic.git/metropolis/node/core/network/dhcp4c/callback"
-	"git.monogon.dev/source/nexantic.git/metropolis/pkg/logtree"
-	"git.monogon.dev/source/nexantic.git/metropolis/pkg/supervisor"
-	"git.monogon.dev/source/nexantic.git/metropolis/test/launch"
+	common "source.monogon.dev/metropolis/node"
+	"source.monogon.dev/metropolis/node/core/network/dhcp4c"
+	dhcpcb "source.monogon.dev/metropolis/node/core/network/dhcp4c/callback"
+	"source.monogon.dev/metropolis/pkg/logtree"
+	"source.monogon.dev/metropolis/pkg/supervisor"
+	"source.monogon.dev/metropolis/test/launch"
 )
 
 var switchIP = net.IP{10, 1, 0, 1}