refactor: change json-rpc trait names, relax bounds #5783

Job	Run time
doctest	1m 50s
test ubuntu-latest stable --no-default-features	1m 56s
check no_std	40s
test ubuntu-latest stable	1m 57s
clippy	1m 2s
test ubuntu-latest stable --all-features	2m 28s
test ubuntu-latest nightly --no-default-features	1m 48s
docs	57s
feature-checks	7m 1s
test ubuntu-latest nightly	1m 47s
fmt	12s
test ubuntu-latest nightly --all-features	1m 52s
wasm-unknown	1m 51s
wasm-wasi	2m 49s
test ubuntu-latest 1.81 --no-default-features	1m 3s
test ubuntu-latest 1.81	1m 5s
test windows-latest stable --no-default-features	5m 12s
test windows-latest stable	5m 26s
test windows-latest stable --all-features	6m 6s
test windows-latest nightly --no-default-features	4m 58s
test windows-latest nightly	4m 50s
test windows-latest nightly --all-features	6m 23s
test windows-latest 1.81 --no-default-features	2m 14s
test windows-latest 1.81	2m 59s
deny / cargo deny check	19s
ci success	2s
	1h 8m 47s

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