Inject the SSH public key into the Fedora and AlmaLinux seed ISOs

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

seediso/fedora44/user-data

@@ -10,6 +10,8 @@ users:
     shell: /bin/bash
     sudo: "ALL=(ALL) NOPASSWD: ALL"
     lock_passwd: false
+    ssh_authorized_keys:
+      - @SSH_PUBKEY@
     hashed_passwd: $6$0NtCERV3eO12t9oJ$nlFE2sSc66nFfuD5X0xMnOla1cuzOnHfeGNRY5X7dCDHg.WzWVmuRe7M17Puj44.eCWLnJAWt4WNjd9vP9X0D0
 
 chpasswd: