feat: bareos_dir plugin support, separate vars by distro #28

Job	Run time
lint	23s
test (debian, latest)	4m 14s
test (debian, bullseye)	4m 12s
test (debian, buster)	4m 12s
test (enterpriselinux, 7)	4m 13s
test (enterpriselinux, 8)	4m 17s
test (enterpriselinux, latest)	4m 18s
test (fedora, 38)	4m 19s
test (fedora, latest)	4m 11s
test (opensuse, latest)	4m 12s
test (ubuntu, latest)	4m 23s
test (ubuntu, focal)	4m 22s
	47m 16s

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