[v11.0/forgejo] fix: upgrade to the ldap version used for testing to 2.5 (#9418)

**Backport:** https://codeberg.org/forgejo/forgejo/pulls/9417

The LDAP server ontainer image used for tests is pre-populated with:

- https://github.com/rroemhild/docker-test-openldap/tree/v2.5.0/rootfs/
- https://code.forgejo.org/forgejo/forgejo-test-openldap/src/branch/main/rootfs (adds files)

---

use https://code.forgejo.org/forgejo/forgejo-test-openldap with ldap 2.5 instead of a stretch based image with ldap 2.4 that cannot be rebuilt.

- user sshuser exists specifically to test sshKey sync  instead of a modified hermes user
- user bender was different from the base image for no useful  purpose (accent in the name), remove the accent
- the port is 10389 by default instead of 389

Refs https://codeberg.org/forgejo/forgejo/issues/9406

Co-authored-by: Earl Warren <contact@earl-warren.org>
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/9418
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Co-authored-by: forgejo-backport-action <forgejo-backport-action@noreply.codeberg.org>
Co-committed-by: forgejo-backport-action <forgejo-backport-action@noreply.codeberg.org>

.forgejo/workflows/testing.yml

@@ -222,7 +222,7 @@ jobs:
           MINIO_ROOT_PASSWORD: 12345678
         options: --tmpfs /bitnami/minio/data
       ldap:
-        image: data.forgejo.org/oci/test-openldap:latest
+        image: data.forgejo.org/oci/forgejo-test-openldap:1
       pgsql:
         image: data.forgejo.org/oci/bitnami/postgresql:16
         env: