Choice of tests is slightly odd -- but there are a number of tests in
this group which *don't* use the derivative instructions (glslang is
smart enough to not emit them when the expression is known to be uniform).

Bug: b/126330097
Test: dEQP-VK.glsl.derivate.*
Test: dEQP-VK.ubo.*
Change-Id: I8864149104f2ea9b62c75ceae59da4ff8adebc32
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/26548Tested-by: Chris Forbes <chrisforbes@google.com>
Presubmit-Ready: Chris Forbes <chrisforbes@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>