all: use various net/netip parse funcs directly

Mechanical change with perl+goimports.

Changed {Must,}Parse{IP,IPPrefix,IPPort} to their netip variants, then
goimports -d .

Finally, removed the net/netaddr wrappers, to prevent future use.

Updates #5162

Change-Id: I59c0e38b5fbca5a935d701645789cddf3d7863ad
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

tstest/integration/integration_test.go

@@ -18,6 +18,7 @@ import (
 	"log"
 	"net/http"
 	"net/http/httptest"
+	"net/netip"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -830,7 +831,7 @@ func (n *testNode) AwaitIPs() []netaddr.IP {
 		addrs = make([]netaddr.IP, len(ipslice))
 
 		for i, ip := range ipslice {
-			netIP, err := netaddr.ParseIP(ip)
+			netIP, err := netip.ParseAddr(ip)
 			if err != nil {
 				t.Fatal(err)
 			}

tstest/integration/testcontrol/testcontrol.go

@@ -19,6 +19,7 @@ import (
 	"math/rand"
 	"net/http"
 	"net/http/httptest"
+	"net/netip"
 	"net/url"
 	"sort"
 	"strings"
@@ -859,7 +860,7 @@ func filterInvalidIPv6Endpoints(eps []string) []string {
 }
 
 func keepClientEndpoint(ep string) bool {
-	ipp, err := netaddr.ParseIPPort(ep)
+	ipp, err := netip.ParseAddrPort(ep)
 	if err != nil {
 		// Shouldn't have made it this far if we unmarshalled
 		// the incoming JSON response.

tstest/integration/vms/harness_test.go

@@ -14,6 +14,7 @@ import (
 	"log"
 	"net"
 	"net/http"
+	"net/netip"
 	"os"
 	"os/exec"
 	"path"
@@ -240,5 +241,5 @@ outer:
 }
 
 func bytes2Netaddr(inp []byte) netaddr.IP {
-	return netaddr.MustParseIP(string(bytes.TrimSpace(inp)))
+	return netip.MustParseAddr(string(bytes.TrimSpace(inp)))
 }

tstest/integration/vms/vms_test.go

@@ -13,6 +13,7 @@ import (
 	"flag"
 	"fmt"
 	"net"
+	"net/netip"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -452,7 +453,7 @@ func (h *Harness) testDistro(t *testing.T, d Distro, ipm ipMapping) {
 				t.Fatalf("can't get IP: %v", err)
 			}
 
-			netaddr.MustParseIP(string(bytes.TrimSpace(ipBytes)))
+			netip.MustParseAddr(string(bytes.TrimSpace(ipBytes)))
 		})
 
 		t.Run("ping-"+tt.ipProto, func(t *testing.T) {