tstest/deptest: add check that x/exp/{maps,slices} imported as xfoo

Updates #cleanup

Change-Id: I4cbb5e477c739deddf7a46b66f286c9fdb106279
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

cmd/derper/depaware.txt

@@ -186,7 +186,6 @@ tailscale.com/cmd/derper dependencies: (generated by github.com/tailscale/depawa
         golang.org/x/crypto/nacl/box                                 from tailscale.com/types/key
         golang.org/x/crypto/nacl/secretbox                           from golang.org/x/crypto/nacl/box
         golang.org/x/crypto/salsa20/salsa                            from golang.org/x/crypto/nacl/box+
-        golang.org/x/exp/maps                                        from tailscale.com/tailcfg
    L    golang.org/x/net/bpf                                         from github.com/mdlayher/netlink+
         golang.org/x/net/dns/dnsmessage                              from net+
         golang.org/x/net/http/httpguts                               from net/http

cmd/k8s-operator/ingress.go

@@ -8,11 +8,11 @@ package main
 import (
 	"context"
 	"fmt"
+	"slices"
 	"strings"
 	"sync"
 
 	"go.uber.org/zap"
-	"golang.org/x/exp/slices"
 	corev1 "k8s.io/api/core/v1"
 	networkingv1 "k8s.io/api/networking/v1"
 	apierrors "k8s.io/apimachinery/pkg/api/errors"

cmd/k8s-operator/svc.go

@@ -9,11 +9,11 @@ import (
 	"context"
 	"fmt"
 	"net/netip"
+	"slices"
 	"strings"
 	"sync"
 
 	"go.uber.org/zap"
-	"golang.org/x/exp/slices"
 	corev1 "k8s.io/api/core/v1"
 	apierrors "k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/types"

cmd/tailscale/depaware.txt

@@ -194,7 +194,7 @@ tailscale.com/cmd/tailscale dependencies: (generated by github.com/tailscale/dep
         golang.org/x/crypto/pbkdf2                                   from software.sslmate.com/src/go-pkcs12
         golang.org/x/crypto/salsa20/salsa                            from golang.org/x/crypto/nacl/box+
    W    golang.org/x/exp/constraints                                 from github.com/dblohm7/wingoes/pe
-        golang.org/x/exp/maps                                        from tailscale.com/cmd/tailscale/cli+
+        golang.org/x/exp/maps                                        from tailscale.com/cmd/tailscale/cli
         golang.org/x/net/bpf                                         from github.com/mdlayher/netlink+
         golang.org/x/net/dns/dnsmessage                              from net+
         golang.org/x/net/http/httpguts                               from net/http+

cmd/testwrapper/testwrapper.go

@@ -19,12 +19,12 @@ import (
 	"log"
 	"os"
 	"os/exec"
+	"slices"
 	"sort"
 	"strings"
 	"time"
 
 	xmaps "golang.org/x/exp/maps"
-	"golang.org/x/exp/slices"
 	"tailscale.com/cmd/testwrapper/flakytest"
 )