Generate go.work files

This creates go.work and enables Go Workspaces.  This is a file that
includes info on k/k and all the staging modules.

This depends on go 1.22 and setting FORCE_HOST_GO=true (for kube
scripts, which try to be hermetic).

Make this part of the normal update/verify sequence.

The top-level go.work file contains no replace statements. Instead, the
replace statements in the individual go.mod files are used. For this to
work, replace statements in the individual go.mod files have to be
consistent.

hack/tools has different dependencies and can't be in the main
workspace, so this adds a go.work just for that.  Without this, go tries
to consider all deps in all modules and pick one that works for all.
This is problematic because there are so many of them that it is
difficult to manage.

Likewise for k8s.io/code-generator/examples and
k8s.io/kms/internal/plugins/_mock - add trivial go.work files.

For example k/k depends on an older version of a lib that gloangci-lint
needs (transitively) and it breaks.

This also updates vendor (needed to make go happy), and removes
vendor'ed symlinks.  This breaks a LOT of our build tools, which will be
fixed subsequently.

Result: `go` commands work across modules:

Before:
```
$ go list ./pkg/proxy/iptables/ ./staging/src/k8s.io/api/core/v1/
main module (k8s.io/kubernetes) does not contain package k8s.io/kubernetes/staging/src/k8s.io/api/core/v1

$ go build ./pkg/proxy/iptables/ ./staging/src/k8s.io/api
main module (k8s.io/kubernetes) does not contain package k8s.io/kubernetes/staging/src/k8s.io/api

$ go test ./pkg/proxy/iptables/ ./staging/src/k8s.io/api
main module (k8s.io/kubernetes) does not contain package k8s.io/kubernetes/staging/src/k8s.io/api
```

After:
```
$ go list ./pkg/proxy/iptables/ ./staging/src/k8s.io/api/core/v1/
k8s.io/kubernetes/pkg/proxy/iptables
k8s.io/api/core/v1

$ go build ./pkg/proxy/iptables/ ./staging/src/k8s.io/api

$ go test ./pkg/proxy/iptables/ ./staging/src/k8s.io/api
ok  	k8s.io/kubernetes/pkg/proxy/iptables	0.360s
ok  	k8s.io/api	2.302s
```

Result: `make` fails:

```
$ make
go version go1.22rc1 linux/amd64
+++ [0106 12:11:03] Building go targets for linux/amd64
    k8s.io/kubernetes/cmd/kube-proxy (static)
    k8s.io/kubernetes/cmd/kube-apiserver (static)
    k8s.io/kubernetes/cmd/kube-controller-manager (static)
    k8s.io/kubernetes/cmd/kubelet (non-static)
    k8s.io/kubernetes/cmd/kubeadm (static)
    k8s.io/kubernetes/cmd/kube-scheduler (static)
    k8s.io/component-base/logs/kube-log-runner (static)
    k8s.io/kube-aggregator (static)
    k8s.io/apiextensions-apiserver (static)
    k8s.io/kubernetes/cluster/gce/gci/mounter (static)
    k8s.io/kubernetes/cmd/kubectl (static)
    k8s.io/kubernetes/cmd/kubectl-convert (static)
    github.com/onsi/ginkgo/v2/ginkgo (non-static)
    k8s.io/kubernetes/test/e2e/e2e.test (test)
    k8s.io/kubernetes/test/conformance/image/go-runner (non-static)
    k8s.io/kubernetes/cmd/kubemark (static)
    github.com/onsi/ginkgo/v2/ginkgo (non-static)
    k8s.io/kubernetes/test/e2e_node/e2e_node.test (test)
test/e2e/e2e.go:35:2: cannot find package "k8s.io/api/apps/v1" in any of:
	/home/thockin/src/kubernetes/_output/local/go/src/k8s.io/kubernetes/vendor/k8s.io/api/apps/v1 (vendor tree)
	/home/thockin/src/kubernetes/_output/local/.gimme/versions/go1.22rc1.linux.amd64/src/k8s.io/api/apps/v1 (from $GOROOT)
	/home/thockin/src/kubernetes/_output/local/go/src/k8s.io/api/apps/v1 (from $GOPATH)
	... more ...
	... more ...
	... more ...
!!! [0106 12:13:41] Call tree:
!!! [0106 12:13:41]  1: /home/thockin/src/kubernetes/hack/lib/golang.sh:948 kube::golang::build_binaries_for_platform(...)
!!! [0106 12:13:41]  2: hack/make-rules/build.sh:27 kube::golang::build_binaries(...)
!!! [0106 12:13:41] Call tree:
!!! [0106 12:13:41]  1: hack/make-rules/build.sh:27 kube::golang::build_binaries(...)
!!! [0106 12:13:41] Call tree:
!!! [0106 12:13:41]  1: hack/make-rules/build.sh:27 kube::golang::build_binaries(...)
make: *** [Makefile:96: all] Error 1
```

Again, this requires go 1.22 (e.g. gotip), as go 1.21.x does not have
`go work vendor` support.

TO REPEAT:
    ( \
      ./hack/update-go-workspace.sh; \
      ./hack/update-vendor.sh; \
      ./hack/update-go-workspace.sh; \
    )

Kubernetes-commit: 65b841c077e0d3282d28b9199aec72d23d045104

go.mod

@@ -2,7 +2,7 @@
 
 module k8s.io/mount-utils
 
-go 1.21
+go 1.22.0
 
 require (
 	github.com/moby/sys/mountinfo v0.6.2
@@ -21,3 +21,5 @@ require (
 	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
+
+replace k8s.io/mount-utils => ../mount-utils

go.sum

@@ -18,6 +18,7 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
 github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=