chore: rely on nss-rs for NSS initialization and test DB #2588

Job	Run time
Check Android (x86_64-linux-android)	2m 4s
Run checks for VM-only platforms (openbsd)	2m 33s
Run checks for VM-only platforms (netbsd)	3m 16s
Run checks for VM-only platforms (solaris)	4m 49s
Check Android (i686-linux-android)	7m 5s
Check Android (aarch64-linux-android)	1m 8s
Generate linux bindings	58s
Run checks for VM-only platforms (freebsd)	3m 20s
Network namespace tests	11s
Generate macos bindings	59s
Check bindings	7s
	26m 30s

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