Implement `pallet-asset-rewards` #18157

Job	Run time
check-dependency-rules	8s
check-fail-ci	13s
check-markdown	14s
check-workspace	18s
check-readme	3m 9s
preflight / preflight	46s
preflight / ci-versions	54s
check-rust-feature-propagation	1m 56s
test-rust-features	1m 59s
fmt	1m 8s
check-umbrella	2m 21s
check-toml-format	1m 5s
All quick checks passed	1s
	14m 12s

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