[release-branch.go1.21] net/http: update bundled golang.org/x/net/http2

Disable cmd/internal/moddeps test, since this update includes PRIVATE
track fixes.

Fixes CVE-2023-45288
For #65051
Fixes #65387

Change-Id: I17da6da2fe0dd70062b49f94377875acb34829a1
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/2197267
Reviewed-by: Dmitri Shuralyov <[email protected]>
Run-TryBot: Damien Neil <[email protected]>
Reviewed-by: Tatiana Bradley <[email protected]>
Reviewed-on: https://go-review.googlesource.com/c/go/+/576075
TryBot-Bypass: Dmitri Shuralyov <[email protected]>
Commit-Queue: Dmitri Shuralyov <[email protected]>
Auto-Submit: Dmitri Shuralyov <[email protected]>
Reviewed-by: Than McIntosh <[email protected]>

Author: neild

src/cmd/internal/moddeps/moddeps_test.go

@@ -33,6 +33,8 @@ import (
 // See issues 36852, 41409, and 43687.
 // (Also see golang.org/issue/27348.)
 func TestAllDependencies(t *testing.T) {
+	t.Skip("TODO(#65051): 1.21.9 contains unreleased changes from vendored modules")
+
 	goBin := testenv.GoToolPath(t)
 
 	// Ensure that all packages imported within GOROOT