feat(rpc-type-eth) convert vec TxReq to bundle #3315

Job	Run time
wasm-wasi	2m 50s
wasm-unknown	2m 10s
clippy	1m 18s
cfg-check	23s
docs	51s
doctest	2m 36s
feature-checks	6m 3s
fmt	12s
no-std	36s
test ubuntu-latest stable --no-default-features	2m 20s
test ubuntu-latest stable	2m 19s
test ubuntu-latest nightly --no-default-features	1m 6s
test ubuntu-latest nightly	1m 13s
test ubuntu-latest 1.76 --no-default-features	1m 36s
test ubuntu-latest 1.76	1m 33s
test windows-latest stable --no-default-features	4m 57s
test windows-latest stable	4m 54s
test windows-latest nightly --no-default-features	5m 39s
test windows-latest nightly	3m 54s
test windows-latest 1.76 --no-default-features	3m 28s
test windows-latest 1.76	5m 16s
	55m 14s

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