`A4-7-1`: Exclude pointer increment/decrement

### Affected rules
 - `A4-7-1`

### Description

This query is reporting `++` and `--` on pointers, however the rule is restricted to data loss on integer operations.

In addition, the message currently says:

> Binary expression ...++... may overflow.

Which is incorrect because we can also report unary expressions.

### Example
```cpp
pointer++; // Should be ignored
```
