nir/cse: resize the instruction set

nir/cse: resize the instruction set

ministat (CSE only):
Difference at 95.0% confidence
	-3357.54 +/- 32.5177
	-25.267% +/- 0.24098%
	(Student's t, pooled s = 33.909)

ministat (entire run):
Difference at 95.0% confidence
	-3414.27 +/- 270.628
	-2.76477% +/- 0.217647%
	(Student's t, pooled s = 282.207)

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6390>