[clang-tools-extra] [clang-tidy] In C++17, callee is guaranteed to be sequenced before arguments. (PR #93623)

[Kefu Chai via cfe-commits]

tchaikov wrote:

v3:

- allocate `CFGReverseBlockReachabilityAnalysis` on stack not on heap, as it's small enough and can be fit in the stack.
- initialize `EvaluationOrderUndefined` in-class to be more consistent. please note, before this change, it's always initialized if it's going to be referenced.

https://github.com/llvm/llvm-project/pull/93623