Relative pointer variable for struct shows misleading increments/offsets in decompilation

[KKhanhH]

Describe the bug
The increments and offsets of relative pointers to structs is misleading. A variable of type Struct* when incremented by the sizeof Struct will show as incrementing by 1. An increment of a relative pointer of the same type will have its increment value be shown as (byte offset)/sizeof(pointed to struct member).

To Reproduce
Steps to reproduce the behavior:
Have a struct with some members defined.
Create a relative pointer for a struct by right-clicking on a variable and clicking "Adjust pointer offset", set DataType and offset accordingly.
Increments and offsets do not match that of DataType*.

Expected behavior
A clear and concise description of what you expected to happen.
The relative pointer should be treated the same as a pointer to the datatype, matching increments and offsets.
If the byte increment is not a valid multiple of the data type, then the pointer should have a cast done.

struct Struct {
  float a;
  float b;
};

Struct x;
Struct* ptr = &x->b;
ptr += 1; 

Struct_ptr_8_float relPtr = &x->b;
// ptr = (Struct_ptr_8_float)((int)relPtr + sizeof(Struct));
ptr += 2; //Current incorrect behavior, struct size is 8, float size is 4, so increments by 2

Struct_ptr_8_float relPtr2 = &x->b;
// ptr = (Struct_ptr_8_float)((int)relPtr + sizeof(Struct));
ptr += 1; //Correct behavior

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Attachments
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Environment (please complete the following information):

• OS: Windows 11
• Java Version: 21
• Ghidra Version: 11.3.1
• Ghidra Origin: GitHub Release

Additional context
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