network/litep2p: Update litep2p network backend to version 0.8.1 #5951

Job	Run time
preflight / preflight	39s
preflight / ci-versions	1m 12s
cargo-check-benches (master)	21m 9s
cargo-check-benches (current)	24m 25s
test-frame-ui	47m 12s
test-full-crypto-feature	2m 48s
test-node-metrics	11m 17s
cargo-check-all-crate-macos	11m 36s
cargo-check-each-crate (1)	20m 22s
cargo-check-each-crate (2)	25m 32s
cargo-check-each-crate (3)	9m 43s
cargo-check-each-crate (4)	22m 58s
cargo-check-each-crate (5)	32m 24s
cargo-check-each-crate (6)	16m 19s
cargo-check-each-crate (7)	33m 58s
test-frame-examples-compile-to-wasm	3m 14s
test-deterministic-wasm	6m 36s
check-tracing	2m 41s
check-metadata-hash	6m 25s
node-bench-regression-guard	13s
All test misc tests passed	1s
	5h 0m 44s

Provide feedback