chore: swap `BlockHashOrNumber` alias and struct name #3869

Job	Run time
test ubuntu-latest stable --no-default-features	1m 45s
doctest	1m 57s
feature-checks	3m 3s
test ubuntu-latest stable	1m 45s
no-std	19s
test ubuntu-latest stable --all-features	3m 17s
wasm-unknown	1m 31s
test ubuntu-latest nightly --no-default-features	1m 7s
test ubuntu-latest nightly	1m 5s
wasm-wasi	2m 28s
test ubuntu-latest nightly --all-features	1m 59s
cfg-check	24s
test ubuntu-latest 1.79 --no-default-features	31s
test ubuntu-latest 1.79	37s
clippy	55s
test windows-latest stable --no-default-features	4m 47s
docs	53s
test windows-latest stable	4m 24s
fmt	13s
test windows-latest stable --all-features	5m 40s
test windows-latest nightly --no-default-features	3m 54s
test windows-latest nightly	4m 23s
test windows-latest nightly --all-features	4m 41s
test windows-latest 1.79 --no-default-features	2m 20s
test windows-latest 1.79	2m 10s
	56m 8s

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