[Direct3D12] Memory leak on window resize

Describe the bug On the D3D12 backend, resizing the window either by grabbing the window border and moving it or repeatedly calling "kinc_window_resize(0, x, y)" results in increasing memory usage, at least according to task manager and my increasingly choking PC. If resized enough times, memory usage seems to ramp explosively. This doesn't occur on the D3D11 graphics backend.

To Reproduce Steps to reproduce the behavior: Grab something like https://github.com/Kinc-Samples/Texture-Kinc/tree/main, in texture.c include "kinc/window.h", and modify the update loop with something like:

    static bool resized = false;
    if (resized)
    {
        kinc_window_resize(0, 400, 400);
    }
    else
    {
        kinc_window_resize(0, 600, 600);
    }
    resized = !resized;

Expected behavior Mostly consistent memory usage that doesn't increase substantially

Screenshots 20mb to 2gigs after 10ish seconds of running the modified texture sample, ouch, my memory https://i.imgur.com/WfNcbk1.png

Execution Environment:

Host system (where you compile your code): Windows 10
Target system (where you run your code): Windows 10
IDE and/or compiler used: VS2022
Kinc revision: Tested with latest (d90b747)
Kinc build output: Using Kinc (d90b7478) from C:\HaxeLibraries\Kinc
Application output (if it runs): Minus several gigs of RAM

Additional context Don't leave your test program running too long :)

Kode / Kinc

[Direct3D12] Memory leak on window resize #810