[clang] [clang][analyzer][NFCi] Pass if bind is to a Decl or not to checkBind (PR #152137)

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gamesh411 wrote:

My proposed discussion points about this:
Is the name `atDeclInit` (OK/meaningful enough) to expose to the API users? (I also thought about: isDecl, isInitialization, belongsToDecl, but none of these seemed great)
Does the extra boolean flag introduce any performance overhead? (I'll try to measure this on some open source projects)


https://github.com/llvm/llvm-project/pull/152137