Merge pull request #50407 from ixdy/gazelle-and-kazel

Automatic merge from submit-queue (batch tested with PRs 49488, 50407, 46105, 50456, 50258)

Manage BUILD files using gazelle + kazel

**What this PR does / why we need it**: uses the upstream `gazelle` tool to manage go rules in BUILD files.
This is needed to support Bazel builds on Mac OS and Bazel cross compilation in general.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #47558

**Special notes for your reviewer**:
It's probably easiest to review this commit-by-commit:
* bump to latest `rules_go` (for recent `cgo_library` and `gazelle` improvements)
* update `kazel` with recent compatibility fixes (kubernetes/repo-infra#28, kubernetes/repo-infra#27), update `hack` scripts to download/build `gazelle`, and then run both `gazelle` and `kazel`. (Additionally make `gazelle` skip things it shouldn't touch.)
* run `hack/update-bazel.sh` to autogenerate everything
* remove the old `cgo_genrule` rules - these are now part of `go_library`
* remove the `automanaged` tags from all go rules - `gazelle` doesn't use them, and it prevents an old version of `kazel/gazel` from messing with the rules
* remove the `licenses()` rules from everywhere but `third_party/` - we don't need them, and `gazelle` won't add them on new `BUILD` files it generates.

**Release note**:

```release-note
NONE
```
for review:
/assign @mikedanese @spxtr 
for approval:
/assign @thockin

Author: Kubernetes Submit Queue

pkg/cloudprovider/providers/openstack/BUILD

@@ -1,7 +1,5 @@
 package(default_visibility = ["//visibility:public"])
 
-licenses(["notice"])
-
 load(
     "@io_bazel_rules_go//go:def.bzl",
     "go_library",
@@ -20,7 +18,6 @@ go_library(
         "openstack_routes.go",
         "openstack_volumes.go",
     ],
-    tags = ["automanaged"],
     deps = [
         "//pkg/api/v1/helper:go_default_library",
         "//pkg/api/v1/service:go_default_library",
@@ -73,7 +70,6 @@ go_test(
         "openstack_test.go",
     ],
     library = ":go_default_library",
-    tags = ["automanaged"],
     deps = [
         "//pkg/cloudprovider:go_default_library",
         "//vendor/github.com/gophercloud/gophercloud:go_default_library",

pkg/volume/cinder/BUILD

@@ -1,7 +1,5 @@
 package(default_visibility = ["//visibility:public"])
 
-licenses(["notice"])
-
 load(
     "@io_bazel_rules_go//go:def.bzl",
     "go_library",
@@ -16,7 +14,6 @@ go_library(
         "cinder_util.go",
         "doc.go",
     ],
-    tags = ["automanaged"],
     deps = [
         "//pkg/cloudprovider:go_default_library",
         "//pkg/cloudprovider/providers/openstack:go_default_library",
@@ -47,7 +44,6 @@ go_test(
         "cinder_test.go",
     ],
     library = ":go_default_library",
-    tags = ["automanaged"],
     deps = [
         "//pkg/cloudprovider:go_default_library",
         "//pkg/util/mount:go_default_library",

staging/src/k8s.io/client-go/plugin/pkg/client/auth/openstack/BUILD

@@ -1,7 +1,5 @@
 package(default_visibility = ["//visibility:public"])
 
-licenses(["notice"])
-
 load(
     "@io_bazel_rules_go//go:def.bzl",
     "go_library",
@@ -12,13 +10,11 @@ go_test(
     name = "go_default_test",
     srcs = ["openstack_test.go"],
     library = ":go_default_library",
-    tags = ["automanaged"],
 )
 
 go_library(
     name = "go_default_library",
     srcs = ["openstack.go"],
-    tags = ["automanaged"],
     deps = [
         "//vendor/github.com/golang/glog:go_default_library",
         "//vendor/github.com/gophercloud/gophercloud/openstack:go_default_library",