CI: some test jobs are redundant

[leofang]

Right now this matrix would generate 60=2*5*3*2 jobs:

cuda-python/.github/workflows/build-and-test.yml

Lines 184 to 203 in c09e914

	matrix:
	host-platform:
	- linux-64
	- linux-aarch64
	# TODO: enable testing once win-64 GPU runners are up
	# - win-64
	python-version:
	- "3.13"
	- "3.12"
	- "3.11"
	- "3.10"
	- "3.9"
	cuda-version:
	# Note: this is for test-time only.
	- "12.6.2"
	- "12.0.1"
	- "11.8.0"
	local-ctk:
	- 1 # use mini CTK
	- 0 # use CTK wheels

However, 10=2*5 of them (CTK 12.0.1 wheels) are redundant and can be removed, because it is hard to install the 12.0 wheels through the package dependency resolution. We should just remove them.