Add config flag to disable SSBO alignment workaround

[emryd]

Add no_ssbo_alignment config flag to disable SSBO alignment workaround.

This fixes the crashes in Horizon: Forbidden West in the Death's Door area which appear for some users, tested on a GeForce GTX 1080. See ValveSoftware/Proton#7590 (comment) for similar crashes reports.

Here is a debug log when such crashes occur:

6769.539:011c:01fc:info:vkd3d-proton:vkd3d_pipeline_library_disk_thread_main: Flushing disk cache (wakeup counter since last flush = 319). It seems like application has stopped creating new PSOs for the time being.

[HansKristian-Work]

I don't buy outright that this is a fix. This will also completely cripple performance, since no descriptor buffer and offset buffers for SSBO which is devastatingly bad.

We also use NV_raw_access_chains on NV, which makes alignment fully driven by shader anyway.

[HansKristian-Work]

This need actual proof of what is going on. To start with, a reproducing save file would be needed to progress this.