[clang-format] Fix PointerAlignment: Right not working with tab indentation.

Fixes https://github.com/llvm/llvm-project/issues/55407.

Given configuration:
```
UseTab: Always
PointerAlignment: Right
AlignConsecutiveDeclarations: true
```

Before, the pointer was misaligned in this code:
```
void f() {
	unsigned long long big;
	char	      *ptr; // misaligned
	int		   i;
}
```

That was due to the fact that when handling right-aligned pointers, the Spaces were changed but StartOfTokenColumn was not.

Also, a tab was used not only for indentation but for spacing too when using `UseTab: ForIndentation` config option:
```
void f() {
	unsigned long long big;
	char	      *ptr; // \t after char
	int                i;
}
```

Reviewed By: owenpan

Differential Revision: https://reviews.llvm.org/D125528