(lifting) fix AF modifications updating flags

Current lifting is broken, implementation is here:

    elif decoded.op == OP.POP:
        # possible operands are: af bc de hl ix iy
        flag_write_type = '*' if oper_val == REG.AF else None

        size = REG_TO_SIZE[oper_val]
        tmp = il.pop(size)
        tmp = il.set_reg(size, reg2str(oper_val), tmp, flag_write_type)
        il.append(tmp)

But the flag lifter watches for LLIL_POP (which doesn't trigger flags) instead of LLIL_LOAD ( which does trigger flags)

We'll also need to look closer at the ld lifter to make sure any time we're loading into AF (including the ex opcode) we tell it to do all flags, otherwise none

Start in the lifting implementation shown in the issue and trace how POP, LOAD, ld, and ex operations update AF. Verify that AF loads, including ex, mark all flags and that the flag lifter responds to the correct IL operation. Confirm the change with the project's existing tests, though no specific test file is named.