Aims to fix#127471
Covered the edge case where an int expression is not necessarily
directly wrapped around an 'ImplicitCastExpr' which seemed to be a
requirement in 'use-integer-sign-comparison.cpp' check to trigger.
**For instance**:
```cpp
#include <vector>
bool f() {
std::vector<int> v;
unsigned int i = 0;
return i >= v.size();
}
```
- modernize-use-integer-sign-comparison replaces comparisons between
signed and unsigned integers with their safe C++20 ``std::cmp_*``
alternative, if available.
