Use default ssh config when connecting to bastion

During the infra-deploy playbook, ansible connects to the bastion or
launcher node. It's best that this be done with the user's default ssh
configuration in lieu of the generated one, otherwise connections to the
bastion may fail if the user has a default SSH proxy configured.

ansible/playbooks/infra-deploy.yaml

@@ -373,6 +373,9 @@
             host: "{{ bastion_ip }}"
             search_regex: OpenSSH
             delay: 10
+          vars:
+            ansible_connection: ssh
+            ansible_python_interpreter: null
     - name: Get server info from the cluster
       openstack.cloud.server_info:
         cloud: "{{ os_cloud_name }}"
@@ -502,7 +505,7 @@
     os_bastion_user: ubuntu
     os_network_name: openstack-flex
     os_keypair_name: "{{ os_network_name }}-keypair"
-    ansible_ssh_common_args: "-F {{ lookup('env', 'HOME') }}/.ssh/{{ os_keypair_name }}.config"
+    # ansible_ssh_common_args: "-F {{ lookup('env', 'HOME') }}/.ssh/{{ os_keypair_name }}.config"
     ansible_ssh_private_key_file: "{{ lookup('env', 'HOME') }}/.ssh/{{ os_keypair_name }}.key"
   tasks:
     - name: Create ssh directory on jump host