feat(anvil): use Alloy otterscan types

[fedemagnani]

Motivation

Closes #8298

Solution

Deprecates anvil/src/eth/otterscan/types.rs in favor of Alloy's otterscan types. As recommended by @DaniPopes, logic is moved into otterscan/api.rs expanding Backend implementations and adding free functions.

[DaniPopes]

Please format using nightly cargo +nightly fmt

[mattsse]

unable to review this with all the ; changes ;)

[fedemagnani]

unable to review this with all the ; changes ;)

First commit contains all the relevant changes.

In the second commit I synced the fork and this caused the fmt check to fail.
So I pushed the third commit (containing all the ; fixes) after running cargo fmt which edited modules not involved in my PR.

Shall I revert the last commit?

[fedemagnani]

@mattsse Hopefully better, sorry! :)

[DaniPopes]

lgtm last nit

[DaniPopes]

pending @mattsse

[DaniPopes]

@mattsse gm

[mattsse]

gm!