Bug fix: Argument register will be renamed by `register_renaming_pass`.

[wallds]

bug

    auto block = vtil::basic_block::begin(0x1337);

    vtil::register_desc reg_ecx(vtil::register_physical, registers::cx, vtil::arch::bit_count, 0);

    auto sr0 = block->owner->alloc(vtil::arch::bit_count);

    // The ecx register here is a potential function argument, register_renaming_pass should not work here.
    block->mov(reg_ecx, (uintptr_t)0x880000);
    block->vxcall((uintptr_t)0x10000);

    auto block2 = block->fork(0x2000);
    block2->mov(sr0, reg_ecx);
    block2->mov(reg_ecx, (uintptr_t)1);
    block2->mov(reg_ecx, sr0);
    block2->vxcall((uintptr_t)0x10000);

    auto block3 = block2->fork(0x3000);
    block3->vexit(0ull); // marks the end of a basic_block

    vtil::logger::log(":: Before:\n");
    vtil::debug::dump(block->owner);

    vtil::optimizer::register_renaming_pass{}(block->owner);

    vtil::logger::log(":: After:\n");
    vtil::debug::dump(block->owner);

[thug-shaker]

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