feat: add missing conversion for ExecutionPayloadFieldV2 #5736

Job	Run time
wasm-unknown	2m 59s
test ubuntu-latest stable --no-default-features	2m 36s
check no_std	1m 2s
clippy	1m 29s
test ubuntu-latest stable	2m 30s
docs	1m 2s
test ubuntu-latest stable --all-features	3m 18s
doctest	3m 5s
test ubuntu-latest nightly --no-default-features	1m 5s
feature-checks	8m 39s
fmt	11s
test ubuntu-latest nightly	1m 18s
test ubuntu-latest nightly --all-features	1m 56s
wasm-wasi	3m 55s
test ubuntu-latest 1.81 --no-default-features	1m 39s
test ubuntu-latest 1.81	1m 48s
test windows-latest stable --no-default-features	7m 2s
test windows-latest stable	5m 29s
test windows-latest stable --all-features	5m 50s
test windows-latest nightly --no-default-features	5m 36s
test windows-latest nightly	3m 37s
test windows-latest nightly --all-features	5m 52s
test windows-latest 1.81 --no-default-features	4m 55s
test windows-latest 1.81	3m 29s
deny / cargo deny check	20s
ci success	4s
	1h 20m 46s

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