Dreamfall Chapters: Add other variants of PrePassCollectShadows
Dreamfall Chapters: Replace other PrePassCollectShadows variants with original unity versions
Dreamfall Chapters: Convert other variants of PrePassCollectShadows to shader model 3
Dreamfall Chapters: Pre-emptive fix for another variant of PrePassCollectShadows

NOTE: Other two variants are not fixed! There simply isn't enough usable
ways to transfer the inputs from the VS to the PS, so they can't be
fixed with this technique alone, and will be horribly broken due to the
substituted vertex shader.

I'm leaving them broken as opposed to disabled so that they are obvious
if they are used in-game. The two shaders are 691EDF7D and 8FE84219.

If they become a problem later on I'll have to consider alternatives,
like adding DX9 support to 3DMigoto with unlimited constant
transference, or just modding the unity .asset files directly.
Dreamfall Chapters: Intentionally break unfixable shaders

See the comment - if these are in use I want to know about it, and
figure out what to do then.

There's no point not breaking these - replacing the vertex shader with
the original one from Unity will have already broken these.
Dreamfall Chapters: Low quality floor surface shader
Dreamfall Chapters: Fix low quality floor shader