go.mod,wgengine/magicsock: pull wireguard-go fix for roaming endpoints (#20118)

Bumps wireguard-go pin to include the roaming endpoints fix, and
two internal enhancements.

Pulls stock wireguard-go for non-tailscale simulation in tests,
to use its endpoint discovery mechanism.

Updates #20082

Change-Id: I2ff282cb7fe4ab099ce5e780a1d40ae86a6a6964
Signed-off-by: Alex Valiushko <alexvaliushko@tailscale.com>

go.mod

@@ -109,7 +109,7 @@ require (
 	github.com/tailscale/ts-gokrazy v0.0.0-20260604151927-fc3a567bcf75
 	github.com/tailscale/web-client-prebuilt v0.0.0-20250124233751-d4cd19a26976
 	github.com/tailscale/wf v0.0.0-20240214030419-6fbb0a674ee6
-	github.com/tailscale/wireguard-go v0.0.0-20260604164555-58f7aaceb304
+	github.com/tailscale/wireguard-go v0.0.0-20260611001507-ffb138071028
 	github.com/tailscale/xnet v0.0.0-20240729143630-8497ac4dab2e
 	github.com/tc-hib/winres v0.2.1
 	github.com/tcnksm/go-httpstat v0.2.0
@@ -130,6 +130,7 @@ require (
 	golang.org/x/time v0.15.0
 	golang.org/x/tools v0.44.0
 	golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2
+	golang.zx2c4.com/wireguard v0.0.0-20260522210424-ecfc5a8d5446
 	golang.zx2c4.com/wireguard/windows v0.5.3
 	gopkg.in/square/go-jose.v2 v2.6.0
 	gvisor.dev/gvisor v0.0.0-20260224225140-573d5e7127a8