[18.0] bug fix: stop all kinds of expressions from cnf-exploding

[systay]

Description

In a recent change (#14560) we fixed a bug in the CNF rewriter that stopped it from rewriting a lot of cases.
Unfortunately, we succeeded too well, and the newly rewritten expressions are timing out in expression fuzzing on CI. This is because CNF rewriting in some situations result in huge outputs (see Wikipedia)

This PR stops the rewriting once the produced expression has grown to 10 times the size of the original expression.

Related Issue(s)

Fixes #14569
Backport of #14585

Checklist

• "Backport to:" labels have been added if this change should be back-ported
• Tests were added or are not required
• Did the new or modified tests pass consistently locally and on the CI
• Documentation was added or is not required

[vitess-bot]

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