nak: Switch most Hash{Set,Map} uses to rustc-hash
We shouldn't need to worry about HashDoS attacks because:
1. All of these keys are compiler-assigned IDs which makes it very
difficult to force collitions, and
2. Anyone who can hit the NAK compiler backend can already use CPU
power by spamming shader compiles or using O(n^2) behavior in
shader opt loops
As a result, we can afford to use a weaker hash function without
randomization.
This decreases total compile times by around 12% on shaderdb
(from 8113.74 user to 7115.47 user) on my machine.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34865>
21 files changed
