fix: snapshot generation

[cexbrayat]

It looks like the addition of nightwatch broke the snapshot generation, as nightwatch was added to the deny list (correctly), but it means that the only combinations that are filtered are the ones with the 3 e2e test libraries at the same time.

We also need to filter out the combination of Cypress with Playwright, Cypress with Nightwatch, and Playwright with Nightwatch.

See https://github.com/vuejs/create-vue-templates/ that currently includes cypress-playwright for example.

This commit updates the script to remove all generated combinations, and to generate only the proper ones.

[cexbrayat]

@sodatea This is a first step to support Vite 5: currently ,the pnpm test script is failing because the playground includes projects that can't work.
Then we need to fix the *-nightwatch projects. They aren't tested on CI, and they don't work out-of-the-box. I'll see what I can do when this PR lands.

[haoqunjiang]

Then we need to fix the *-nightwatch projects. They aren't tested on CI, and they don't work out-of-the-box. I'll see what I can do when this PR lands.

GitHub Actions limits the maximum number of jobs a matrix can generate, so I had to leave out some of the tests.
Maybe we can squash some small jobs into one and parallelize the rest; hopefully the CI time won't increase too much.

[cexbrayat]

Thanks for the review. I'll fix the local test script first to make sure Nightwatch projects are OK, then we can take a look at the CI workflow 👍