Add IgnoreMacros option to readability-function-size

[adambadura]

Add IgnoreMacros option to readability-function-size check to mimic the same in readability-function-cognitive-complexity.

Counting the function size with expanded macros will make it more likely to break limits. Whereas macros are more like function calls regarding the readability.

[llvmbot]

@llvm/issue-subscribers-clang-tidy

Author: Adam Badura (adambadura)

Add `IgnoreMacros` option to `readability-function-size` check to mimic the same in `readability-function-cognitive-complexity`.

Counting the function size with expanded macros will make it more likely to break limits. Whereas macros are more like function calls regarding the readability.