*: 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/proto/internal/BUILD.bazel b/metropolis/proto/internal/BUILD.bazel
index 2951a08..5c2cce1 100644
--- a/metropolis/proto/internal/BUILD.bazel
+++ b/metropolis/proto/internal/BUILD.bazel
@@ -10,7 +10,7 @@
 
 go_proto_library(
     name = "internal_go_proto",
-    importpath = "git.monogon.dev/source/nexantic.git/metropolis/proto/internal",
+    importpath = "source.monogon.dev/metropolis/proto/internal",
     proto = ":internal_proto",
     visibility = ["//metropolis:__subpackages__"],
 )
@@ -18,6 +18,6 @@
 go_library(
     name = "go_default_library",
     embed = [":internal_go_proto"],
-    importpath = "git.monogon.dev/source/nexantic.git/metropolis/proto/internal",
+    importpath = "source.monogon.dev/metropolis/proto/internal",
     visibility = ["//metropolis:__subpackages__"],
 )
diff --git a/metropolis/proto/internal/internal.proto b/metropolis/proto/internal/internal.proto
index e82fe96..33a7239 100644
--- a/metropolis/proto/internal/internal.proto
+++ b/metropolis/proto/internal/internal.proto
@@ -15,7 +15,7 @@
 // limitations under the License.
 
 syntax = "proto3";
-option go_package = "git.monogon.dev/source/nexantic.git/metropolis/proto/internal";
+option go_package = "source.monogon.dev/metropolis/proto/internal";
 package metropolis.proto.internal;
 
 // Node describes a single node's state in etcd