Fix cypress dependencies

[paolodamico]

Changes

UPDATE: The broken dependency issue seems to have been fixed upstream. This PR still might be worth so we don't have unnecessary devDependencies installed.

• This PR also fixes a broken test and improves the output of formatLabel() utility.

Today all frontend-related CI runs started failing (could be due to this, cypress-io/cypress#15797).

• This PR removes @cypress dependencies from main package.json in favor of installing them directly in the CI runs (as we do with the main cypress package).
• We also target a specific version of these dependencies that works fine.

Checklist

• All querysets/queries filter by Organization, by Team, and by User. Not applicable.
• Django backend tests. Not applicable.
• Jest frontend tests
• Cypress end-to-end tests

[EDsCODE]

This looks good now. There seems to be a flaky backend test though

[paolodamico]

Failing backend test is unrelated. Merging https://github.com/PostHog/posthog-cloud/pull/100/ will fix it.

[EDsCODE]

Hmm I just realized though that we're going to need some solution for running cypress locally

[paolodamico]

Well I can whip up a simple script. Usually what I do is just copy the command on the GH script and run it.