Move trie functions to alloy

[mattsse]

Describe the feature

ref #11208

these are beneficial and can be used for things like txroot withdrawals root, etc:

https://github.com/paradigmxyz/reth/blob/1e0a35e744633e605cf6ddd24f4b1c9d73b198c2/crates/trie/common/src/root.rs#L21-L30

imo we can move these to alloy-trie or somewhere else @DaniPopes ?

Additional context

No response