Upgrade dependencies to resolve semver advisory

[aduth]

🛠 Summary of changes

Updates dependencies to resolve all security advisories related to semver.

This is a follow-up to #8659, where previously some dependencies could not be updated, since they were pinned to an older version of semver which had not been patched. The older versions have since been patched (semver@6.3.1, semver@5.7.2), so we can now resolve the advisory completely.

The approach largely follows this suggestion to remove and reinstall entries of affected packages from yarn.lock (specifically semver and core-js-compat), as well as upgrading stylelint to the latest version.

This removes the audit-ci tooling added in #8659, since we don't have a need for an allowlist at the moment, as all advisories have been addressed.

📜 Testing Plan

yarn audit produces a clean result.