fix: Correctly check artifacthub for policies that use tags

[viccuad]

Description

Relates to https://github.com/kubewarden/kubewarden-controller/issues/389.

Obtain tag string correctly For reusable-test-policy- jobs: check artifacthub-pkg.yml, but ignore the version field, as the tag is not yet created. For reusable-release-policy- jobs: check artifacthub-pkg.yml, and check the version field, as the tag is created.

Test

• On test, example of success, as we can't check the version yet: https://github.com/viccuad/hostpaths-psp-policy/actions/runs/4436667835 https://github.com/viccuad/hostpaths-psp-policy/actions/runs/4436667844
• On release, example of failure because they forgot to bump the version in all artifacthub-pkg.yml: https://github.com/viccuad/hostpaths-psp-policy/actions/runs/4436678314/jobs/7785403964 This is fixed by committing the result of: touch metadata.yml && make artifacthub-pkg.yml VERSION=0.1.8

Additional Information

Tradeoff

Potential improvement

Needing to manually do make --always-make artifacthub-pkg.yml VERSION=0.1.8 is not very discoverable for users. At least it is included in the error string though.

[viccuad]

This will be tagged as v2.0.1, and the v2 tag pointing to it.