Rotate ansible-vault password to a stronger key

Replace the weak vault password with a randomly generated 64-character
base64-encoded key. The vault-pass file in shiftstack-tools and the
shiftstack-client container image have been updated accordingly.

OSPRH-32937

Change-Id: I4d86640a7e92c46492dd47513f481870d7a11902
Signed-off-by: Itay Matza <imatza@redhat.com>

Author: imatza-rh