fix(gittag) ensure gittag targets does not fail due to (unspecified) version filters

[dduportal]

This PR fixes the gittag resource where the target fails due to the default Version Filter.

There are 2 blocking bugs fixed at the same time:

• Comparing error message between 2 packages is fragile as the errors templates are subject to changes
  • The proposed solution here is to export the errors in the version so their error message (template) can be reused for solid comparison.
• Validating the target configuration must be done against the spec (provided by user) and not against the internal configuration

Test

• Unit tests have been checked (and will be by the github action checks as a reference)
• The End to end test has been renamed and updated to cover all cases:
  • Both Git and GitHub SCM for gittag sources
  • Both Git and GitHub SCM for gittag conditions (always passing)
  • Added both Git and GitHub SCM for gittag targets (to underline the fixed errors which is caught at the updatecli diff steps already)
  • Added a target case expected to never change (trying to create an existing tag)

Additional Information

Caught while working on #1406

[olblak]

Very clean
Does the pullrequest introduces a breaking change?

[olblak]

Very clean Does the pullrequest introduces a breaking change?

I don't think so but better to ask

[dduportal]

Very clean Does the pullrequest introduces a breaking change?

It should not. If it does, then it would be a bug (and I would work on fixing it as soon as possible)