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/logbuffer/BUILD.bazel b/metropolis/pkg/logbuffer/BUILD.bazel
index c3e9e2a..cd0e3af 100644
--- a/metropolis/pkg/logbuffer/BUILD.bazel
+++ b/metropolis/pkg/logbuffer/BUILD.bazel
@@ -1,22 +1,22 @@
 load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
 
 go_library(
-    name = "go_default_library",
+    name = "logbuffer",
     srcs = [
         "linebuffer.go",
         "logbuffer.go",
     ],
     importpath = "source.monogon.dev/metropolis/pkg/logbuffer",
     visibility = ["//metropolis:__subpackages__"],
-    deps = ["//metropolis/proto/api:go_default_library"],
+    deps = ["//metropolis/proto/api"],
 )
 
 go_test(
-    name = "go_default_test",
+    name = "logbuffer_test",
     srcs = [
         "linebuffer_test.go",
         "logbuffer_test.go",
     ],
-    embed = [":go_default_library"],
-    deps = ["@com_github_stretchr_testify//require:go_default_library"],
+    embed = [":logbuffer"],
+    deps = ["@com_github_stretchr_testify//require"],
 )