Increasing the maxComputeWorkGroupInvocations to 256 revealed that we're
consuming a lot of memory with the Subzero JIT for compute shaders that
contain control barriers, due to implementing them with the use of
fibers which each have a 1 MiB stack.

Increasing Regres's maximum memory consumption per process keeps the
tests passing while we work on a more long-term solution.

Bug: b/192475710
Change-Id: I027d97d9f28d9749628fc008fe956fd436c77562
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/55368
Kokoro-Result: kokoro <noreply+kokoro@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Corentin Wallez <cwallez@google.com>