[clang-tidy] Fixed an issue in readability-identifier-naming not using options specified.

Fixed an issue where specifying empty strings for prefix or suffix would be ignored preventing using those to override a different style.

Fixes https://github.com/llvm/llvm-project/issues/56358.

Reviewed By: carlosgalvezp

Differential Revision: https://reviews.llvm.org/D129070