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/pkg/event/etcd/BUILD.bazel b/metropolis/pkg/event/etcd/BUILD.bazel
index b00bc47..51ad5c1 100644
--- a/metropolis/pkg/event/etcd/BUILD.bazel
+++ b/metropolis/pkg/event/etcd/BUILD.bazel
@@ -1,28 +1,29 @@
 load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
 
 go_library(
-    name = "go_default_library",
+    name = "etcd",
     srcs = ["etcd.go"],
     importpath = "source.monogon.dev/metropolis/pkg/event/etcd",
     visibility = ["//visibility:public"],
     deps = [
-        "//metropolis/node/core/consensus/client:go_default_library",
-        "//metropolis/pkg/event:go_default_library",
-        "@com_github_cenkalti_backoff_v4//:go_default_library",
-        "@io_etcd_go_etcd//clientv3:go_default_library",
+        "//metropolis/node/core/consensus/client",
+        "//metropolis/pkg/event",
+        "@com_github_cenkalti_backoff_v4//:backoff",
+        "@io_etcd_go_etcd_client_v3//:client",
     ],
 )
 
 go_test(
-    name = "go_default_test",
+    name = "etcd_test",
     srcs = ["etcd_test.go"],
-    embed = [":go_default_library"],
+    embed = [":etcd"],
     deps = [
-        "//metropolis/node/core/consensus/client:go_default_library",
-        "//metropolis/pkg/event:go_default_library",
-        "@io_etcd_go_etcd//clientv3:go_default_library",
-        "@io_etcd_go_etcd//etcdserver/api/v3rpc/rpctypes:go_default_library",
-        "@io_etcd_go_etcd//integration:go_default_library",
-        "@org_golang_google_grpc//codes:go_default_library",
+        "//metropolis/node/core/consensus/client",
+        "//metropolis/pkg/event",
+        "@io_etcd_go_etcd_api_v3//v3rpc/rpctypes",
+        "@io_etcd_go_etcd_client_pkg_v3//testutil",
+        "@io_etcd_go_etcd_client_v3//:client",
+        "@io_etcd_go_etcd_tests_v3//integration",
+        "@org_golang_google_grpc//codes",
     ],
 )