CI: disable testing manylinux2014 #205

Job	Run time
macOS ARM64	1m 21s
Windows x64	2m 20s
macOS x64	2m 9s
Linux x64 (quay.io/pypa/manylinux_2_28_x86_64, 0)	2m 33s
Windows x86	3m 5s
	11m 28s

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