scorecard: use TestList for output, exit 1 on test failure

[joelanford]

Description of the change:

1. Instead of aggregating all test results from ALL scorecard tests under a single v1alpha3.Test status, use a new v1alpha3.TestList to output a list of v1alpha3.Test objects, one for each test defined in the scorecard config file.
2. Exit with status 1 when any test fails.

Motivation for the change:

1. The test results should not be disassociated from the test spec (image/entrypoint) that provided the result.
2. To match existing documentation

Checklist

If the pull request includes user-facing changes, extra documentation is required:

• Add a new changelog fragment in changelog/fragments (see changelog/fragments/00-template.yaml)
• Add or update relevant sections of the docs website in website/content/en/docs

[jmccormick2001]

seems to work for the basic/olm case, the kuttl image needs the updates for that to work again, also the custom test image would need the same updates.

[joelanford]

Just tested kuttl, it also works, which is expected because this PR does not change anything about the pod log interface and result gathering.