fix: CNF with mutually exclusive atoms reduction

[korowa]

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• Bug Fix (user-visible misbehavior in an official stable release)

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Fixed CNF simplification, in case any OR group contains mutually exclusive atoms.

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Closes #57400

Currently reduceOnceCNFStatemtns may produce incorrect result in case any of statements is OR group with mutually exclusive atoms (e.g. x OR !x). Added an additional check to prevent incorrect results + prior filtering of such groups as "always true".

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[korowa]

Stress tests failure looks unrelated -- same reason as #64053

[korowa]

@antonio2368 is it ok if I merge->rebase? Auto merge might not be triggered due to the failures, and there were some modifications for upgrade check last week, probably fixing an issue with the job in this PR

[antonio2368]

@korowa I tried to restart our private workflow which is blocking the merge. If it doesn't work you can merge master into this to restart the CI

[korowa]

@antonio2368 got it, thank you.

Will do, then, if it still will be open.