Switch from push constants to storage buffers #57

Job	Run time
lint (spirv-builder)	5m 55s
lint (cargo-gpu)	7m 13s
xtask test & lint	7m 33s
test (ubuntu-24.04, spirv-builder)	6m 39s
test (macOS-latest, cargo-gpu)	8m 19s
test (macOS-latest, spirv-builder)	8m 58s
test (windows-2022, spirv-builder)	9m 21s
test (windows-2022, cargo-gpu)	9m 46s
test (ubuntu-24.04, cargo-gpu)	8m 41s
test_success	3s
	1h 12m 28s

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