nostr: add `test_nip44_decryption` test #852

Job	Run time
Format	4s
Build WASM (stable, -p nostr)	1m 28s
Build WASM (stable, -p nostr-sdk)	1m 57s
Build WASM (stable, -p nostr-js)	1m 22s
Build WASM (1.64.0, -p nostr)	3m 11s
Build WASM (1.64.0, -p nostr-sdk)	3m 27s
Build WASM (1.64.0, -p nostr-js)	3m 48s
Build (stable, -p nostr)	3m 4s
Build (stable, -p nostr --no-default-features)	1m 42s
Build (stable, -p nostr --no-default-features --features all-nips)	3m 13s
Build (stable, -p nostr --no-default-features --features vanity)	1m 47s
Build (stable, -p nostr --features blocking)	3m 1s
Build (stable, -p nostr-sdk)	3m 12s
Build (stable, -p nostr-sdk --no-default-features)	1m 36s
Build (stable, -p nostr-sdk --features blocking)	2m 51s
Build (stable, -p nostr-ffi)	2m 16s
Build (stable, -p nostr-sdk-ffi)	2m 53s
Build (1.64.0, -p nostr)	4m 53s
Build (1.64.0, -p nostr --no-default-features)	4m 5s
Build (1.64.0, -p nostr --no-default-features --features all-nips)	5m 7s
Build (1.64.0, -p nostr --no-default-features --features vanity)	3m 43s
Build (1.64.0, -p nostr --features blocking)	4m 49s
Build (1.64.0, -p nostr-sdk)	5m 56s
Build (1.64.0, -p nostr-sdk --no-default-features)	3m 33s
Build (1.64.0, -p nostr-sdk --features blocking)	5m 8s
Build (1.64.0, -p nostr-ffi)	4m 44s
Build (1.64.0, -p nostr-sdk-ffi)	5m 54s
	1h 28m 44s

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