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Optimizations of shader compile time

Konstantin Lazukin requested to merge GL/mesa:shader_compile_time_opt into main

Various optimizations to reduce shader compile time in the test dEQP-VK.ssbo.phys.layout.random.16bit.scalar.13 slow. Locally it changes test run time from avg 60.7073s to 27.5676s (100 runs). Not sure if use of STL is allowed here so let me know if I have to rewrite it using custom collections.

Original issue.

One commit moved to separate MR: !14189 (merged).

shader-db for all 3 commits 

total instructions in shared programs: 1104355 -> 1104355 (0.00%)
instructions in affected programs: 0 -> 0
helped: 0
HURT: 0
total loops in shared programs: 1295 -> 1295 (0.00%)
loops in affected programs: 0 -> 0
helped: 0
HURT: 0
total cycles in shared programs: 189266218 -> 189266218 (0.00%)
cycles in affected programs: 0 -> 0
helped: 0
HURT: 0
total spills in shared programs: 1893 -> 1893 (0.00%)
spills in affected programs: 0 -> 0
helped: 0
HURT: 0
total fills in shared programs: 2433 -> 2433 (0.00%)
fills in affected programs: 0 -> 0
helped: 0
HURT: 0
total sends in shared programs: 58986 -> 58986 (0.00%)
sends in affected programs: 0 -> 0
helped: 0
HURT: 0
LOST:   0
GAINED: 0
Total CPU time (seconds): 65.10 -> 44.41 (-31.78%)

Edited by Konstantin Lazukin

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