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### Why?

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### What?

WEB-1086.

This PR flips the way running next.js integration test with Turbopack,
instead of using allowlist to run selectively enabled test now uses
denylists. The immediate effect is now any new test being added (as a
new file) will be executed with Turbopack by default, and should be
manually excluded if it fails.

Still, the number of tests we run remains same.