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>

disco/disco_test.go

@@ -6,6 +6,7 @@ package disco
 
 import (
 	"fmt"
+	"net/netip"
 	"reflect"
 	"strings"
 	"testing"
@@ -61,8 +62,8 @@ func TestMarshalAndParse(t *testing.T) {
 			name: "call_me_maybe_endpoints",
 			m: &CallMeMaybe{
 				MyNumber: []netaddr.IPPort{
-					netaddr.MustParseIPPort("1.2.3.4:567"),
-					netaddr.MustParseIPPort("[2001::3456]:789"),
+					netip.MustParseAddrPort("1.2.3.4:567"),
+					netip.MustParseAddrPort("[2001::3456]:789"),
 				},
 			},
 			want: "03 00 00 00 00 00 00 00 00 00 00 00 ff ff 01 02 03 04 02 37 20 01 00 00 00 00 00 00 00 00 00 00 00 00 34 56 03 15",
@@ -94,7 +95,7 @@ func TestMarshalAndParse(t *testing.T) {
 }
 
 func mustIPPort(s string) netaddr.IPPort {
-	ipp, err := netaddr.ParseIPPort(s)
+	ipp, err := netip.ParseAddrPort(s)
 	if err != nil {
 		panic(err)
 	}