treewide: switch to gomod and bump everything

This switches version resolution from fietsje to gomod and updates
all Go dependencies. It also bumps rules_go (required by gVisor) and
switches the Gazelle naming convention from go_default_xxx to the
standard Bazel convention of the default target having the package
name.

Since Kubernetes dropped upstream Bazel support and doesn't check in
all generated files I manually pregenerated the OpenAPI spec. This
should be fixed, but because of the already-huge scope of this CL
and the rebase complexity this is not in here.

Change-Id: Iec8ea613d06946882426c2f9fad5bda7e8aaf833
Reviewed-on: https://review.monogon.dev/c/monogon/+/639
Reviewed-by: Sergiusz Bazanski <serge@monogon.tech>
Reviewed-by: Leopold Schabel <leo@nexantic.com>
diff --git a/metropolis/test/e2e/main_test.go b/metropolis/test/e2e/main_test.go
index 80140a3..f7dfff8 100644
--- a/metropolis/test/e2e/main_test.go
+++ b/metropolis/test/e2e/main_test.go
@@ -265,7 +265,7 @@
 						Containers: []corev1.Container{{
 							Name:            "preseed-test-1",
 							ImagePullPolicy: corev1.PullNever,
-							Image:           "bazel/metropolis/test/e2e/preseedtest:preseedtest",
+							Image:           "bazel/metropolis/test/e2e/preseedtest:preseedtest_image",
 						}},
 						RestartPolicy: corev1.RestartPolicyNever,
 					},