Cleanup of npk packing and tests (#998) #2529

Job	Run time
Clippy	1m 41s
Check (stable)	2m 19s
Check (1.65.0)	2m 27s
Documentation	1m 36s
Deny (advisories)	1m 35s
Deny (bans licenses sources)	1m 43s
Cross (aarch64-linux-android)	4m 41s
Cross (aarch64-unknown-linux-gnu)	5m 2s
Cross (aarch64-unknown-linux-musl)	4m 18s
Format	10s
Hack	3m 8s
Lint markdown files	46s
Tests	6m 40s
Tools	4m 12s
	40m 18s

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