GS/Vulkan: Utilize dynamic state to reduce pipeline permutations

[stenzek]

Description of Changes

In theory, this means we have fewer shader permutations, which means less stutter on the GS thread. In practice, it probably won't make a huge difference.

DATE is still broken, but Jordan wanted to test performance.

Rationale behind Changes

Fewer pipelines.

Suggested Testing Steps

N/A for now.