build

build: move libnvme github workflows to top dir #3394

Job	Run time
cross (s390x)	57s
fallback shared libraries	1m 28s
cross (ppc64le)	50s
default (clang, debug)	48s
default (gcc, debug)	49s
cross (armhf)	52s
build libnvme and nvme-cli separately	46s
muon minimal static	32s
default (gcc, release)	53s
default (clang, release)	59s
make static	40s
	9m 34s

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