fix(kuttl tests): Use bundled userinfo rego utility

[NickLarsenNZ]

Fixes the test failures (see slack thread):

The effective fixes were cd3c31e and 7c308cc

Traceback (most recent call last):
  File "/tmp/test-regorule.py", line 60, in <module>
    raise e
  File "/tmp/test-regorule.py", line 50, in <module>
something went wrong. last response: {'result': {}}
    assertions(username, response, 

• Use the bundled userinfo rego utility (partially reverts Deploy userinfofetcher regorules #580)
• Improve the output of the test scripts
  • print out the exception, it will have more information (from the assertions() function).
  • ruff formatting

[NickLarsenNZ]

Kuttl tests now pass:

--- PASS: kuttl (68.66s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/keycloak-user-info_opa-latest-0.66.0_keycloak-23.0.1_openshift-false (68.65s)
        --- PASS: kuttl/harness/aas-user-info_opa-latest-0.66.0_openshift-false (32.08s)
PASS

[sbernauer]

Thanks for fixing this!
LGTM as tests passed

[sbernauer]

CC @nightkr, as you wrote the original test

[nightkr]

Yep, looks reasonable to me. Mea culpa.