feat: Add a TraceRpc helper type #3300

Job	Run time
doctest	1m 3s
cfg-check	24s
clippy	42s
test ubuntu-latest stable --no-default-features	1m 24s
docs	52s
test ubuntu-latest stable	1m 17s
feature-checks	3m 5s
test ubuntu-latest nightly --no-default-features	1m 8s
test ubuntu-latest nightly	1m 10s
fmt	11s
no-std	17s
wasm-unknown	36s
wasm-wasi	1m 3s
test ubuntu-latest 1.76 --no-default-features	33s
test ubuntu-latest 1.76	1m 11s
test windows-latest stable --no-default-features	5m 40s
test windows-latest stable	6m 23s
test windows-latest nightly --no-default-features	4m 27s
test windows-latest nightly	5m 19s
test windows-latest 1.76 --no-default-features	2m 59s
test windows-latest 1.76	4m 29s
	44m 13s

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