[forwardport] fix: avoid http3 for dns.google and www.google.com (#593) (#594)

This commit forward ports dedd84fa7ecb09f718f6b1a9c83999cb37b34dfa.

Original commit message:

- - -

This diff changes code the release/3.11 branch to ensure we're not using dns.google and www.google.com over HTTP3. As documented in https://github.com/ooni/probe/issues/1873, since this morning (approx) these services do not support HTTP3 anymore. (I didn't bother with checking whether this issue affects _other_ Google services; I just limited my analysis to the services that we were using as part of testing.)

This patch WILL require forward porting to the master branch.

internal/engine/internal/sessionresolver/resolvermaker.go

@@ -28,8 +28,6 @@ var allmakers = []*resolvermaker{{
 	url: "http3://cloudflare-dns.com/dns-query",
 }, {
 	url: "https://dns.google/dns-query",
-}, {
-	url: "http3://dns.google/dns-query",
 }, {
 	url: "https://dns.quad9.net/dns-query",
 }, {