Upgrade verify-safe-to-test-label to v2

[nilsreichardt]

With v2 of the verify-safe-to-test-label there is no need for a second remove-safe-to-test-label GitHub Action. With the require-reapproval parameter of the verify-safe-to-test-label immediately removes the "safe to test" label after it verified it.

With this PR, we now always first check the "safe to test" label, remove it, run the "changes" job and then the actual job:

verify-safe-to-test-label -> changes -> actual job (e.g. deploy website preview)

[github-actions]

Visit the preview URL for this PR (updated for commit f59f20f):

https://sharezone-console-dev--pr2204-upgrade-verify-safe-z1i7rv1s.web.app

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[github-actions]

Visit the preview URL for this PR (updated for commit f59f20f):

https://sharezone-website-dev--pr2204-upgrade-verify-safe-knqbn9ud.web.app

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[github-actions]

Visit the preview URL for this PR (updated for commit f59f20f):

https://sharezone-test--pr2204-upgrade-verify-safe-0v7cvocw.web.app

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[github-actions]

Visit the preview URL for this PR (updated for commit f59f20f):

https://sharezone-docs-dev--pr2204-upgrade-verify-safe-7nwnrpni.web.app

_{(expires Wed, 04 Mar 2026 18:33:42 GMT)}

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[nilsreichardt]

/gemini review