git: Replace the cgit Ingress with a standalone Certificate.

The cgit IngressRoute only needed the Ingress for cert-manager's
ingress-shim.  HTTP-01 challenges are served by Traefik's ingress-nginx
compat provider (verified 2026-11-05).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Change-Id: Ia3c66912a2a19f8a5eb54a1f2648abfc832838a5
1 file changed