Implement `TryFrom<Bytes>` for `b256`

[ironcev]

This is a tracking issue for Implement TryFrom<Bytes> for b256.
The experimental feature flag for the issue is try_from_bytes_for_b256.

Description

Currently, b256 implements From<Bytes> which can cause data losses. We want to remove that implementation and replace it with TryFrom<Bytes> which will return None if the provided Bytes cannot be safely converted to b256.

Breaking Changes

Replace calls to from(bytes)/bytes.into() with try_from(bytes)/bytes.try_into()

E.g., calls to from:

let result = b256::from(some_bytes);

will become:

let result = b256::try_from(some_bytes).unwrap();

E.g., calls to into:

let result: b256 = some_bytes.into();

will become:

let result: b256 = some_bytes.try_into().unwrap();

Calling unwrap() assumes that the previous usage was always semantically valid. It is recommended to inspect all the previous usages of from/into to ensure unwraping is always safe, or to check for the Option result of try_from/try_into.

[ironcev]

Closed by my mistake in #6958. It must remains open until we fully integrate the feature and remove the experimental flag.