update to go1.25.3

This release addresses breakage caused by a security patch included in
Go 1.25.2 and 1.24.8, which enforced overly restrictive validation on
the parsing of X.509 certificates. We've removed those restrictions
while maintaining the security fix that the initial release addressed.

Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>

e2e/testdata/Dockerfile.gencerts

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1
 
-ARG GO_VERSION=1.25.2
+ARG GO_VERSION=1.25.3
 
 FROM golang:${GO_VERSION}-alpine AS generated
 ENV GOTOOLCHAIN=local