[clang-tools-extra] [clang-tidy][NFC] Enable 'readability-simplify-boolean-expr' check (PR #158706)

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EugeneZelenko wrote:

> > > What do others think?
> > 
> > 
> > I agree, I have somewhat mixed feelings about this rule. Also negating conditions to make them more optimal/short can also lead to worse readability. I believe this is alleviated by setting `SimplifyDeMorgan` to `false`.
> 
> I will do some experimentation the config options

I enabled `IgnoreMacros` when running this check over my work code base, since a lot of warnings were related to stuff like asserts.

https://github.com/llvm/llvm-project/pull/158706