Rename base-minimal/post-ssh to base-minimal/post

This matches the change already made the job config.

Also, sync the ignore_errors from base.

Change-Id: Ia0da319ac022c6d3bc9387616029d0bca997effb

playbooks/base-minimal/post-ssh.yaml

@@ -1,3 +0,0 @@
-- hosts: all
-  roles:
-    - remove-build-sshkey

playbooks/base-minimal/post.yaml

@@ -0,0 +1,10 @@
+- hosts: all
+  roles:
+    - fetch-output
+
+- hosts: all
+  # NOTE(pabelanger): We ignore_errors for the following tasks as not to fail
+  # successful jobs.
+  ignore_errors: yes
+  roles:
+    - remove-build-sshkey