[CI] Github tests trigger for CircleCI

[l0uden]

Description

Here we'll get rid of CircleCI pipeline for vizro repo.
New GitHub Action will trigger tests pipeline instead.

test-integration-vizro-ai and CircleCI tests trigger GitHub Actions will always pass for the forked repos.

test-integration-vizro-ai will run for every push to vizro-ai folder except docs. And will run for every merge to main for changes in any folder.

Connected with https://github.com/mckinsey/vizro-qa/pull/89

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[antonymilne]

Looks good, thanks for all your work on this @l0uden.

I made a few small commits just to make it more consistent with how we do other GHA on this repo:

1. Small renaming - not important
2. Remove remaining references to tag and unnecessary arguments - this one is the only bit that changes functionality. I think when you removed the tag stuff you forgot to remove some parts, so please check this
3. Tiny refactor - not important

If you're happy I didn't break anything here then I'm happy for you to merge whenever. I just did a quick test and it seems to work ok.