Modify pipeline and layout creation to preserve original createInfo if modified by addons

[MohannedElfatih]

Any modifications to pipelines/layouts can cause unexpected errors because it forces it to go through internal functions instead of trampoline. I attempted to modify on top of the original createInfo instead of throwing it all together.

The changes are too extensive (& AI generated obviously) but it's more as a proof of concept to increase reshade's robustness. Please feel free to close it if it doesn't fit reshade's intended approach.

[crosire]

I'm generally not opposed to something like this, similar stuff is already done elsewhere (e.g. D3D12 root signature creation gets original flags passed through in since they don't translate well). Need to disect the code a bit though =P