Build

Improve error propagation in tree scan code and handle ENOENT and EACCES gracefully #3955

Job	Run time
make static	45s
muon minimal static	36s
cross (armhf)	49s
build libnvme and nvme-cli separately	48s
nvme-cli (fedora, gcc, debug)	49s
cross (s390x)	40s
musl libc build on Alpine	44s
nvme-cli (debian, gcc, release)	57s
nvme-cli (debian, gcc, debug)	1m 1s
cross (ppc64le)	47s
nvme-cli (fedora, gcc, release)	1m 2s
musl libc build on Debian	48s
nvme-cli (debian, clang, debug)	59s
nvme-cli (fedora, clang, debug)	48s
nvme-cli (tumbleweed, clang, release)	1m 26s
nvme-cli (fedora, clang, release)	1m 13s
nvme-cli (debian, clang, release)	58s
nvme-cli (tumbleweed, clang, debug)	49s
nvme-cli (tumbleweed, gcc, debug)	45s
nvme-cli (tumbleweed, gcc, release)	1m 15s
libnvme (debian, gcc, release)	1m 21s
fallback shared libraries	0s
	19m 20s

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