Remove in-tree max-encoded-len and use the new SCALE codec crate instead (#9163)

* Update impl-codec to use new upstream MaxEncodedLen trait

* Adapt crates to use the updated codec crate for `MaxEncodedLen`

* Remove max-encoded-len crate altogether

* Fix test compilation in `pallet-proxy`

* reorganize import (#9186)

* Fix remaining `MaxEncodedLen` imports

* Fix remaining old usages of max-encoded-len crate

* Fix UI test

* Manually depend on new impl-codec to fix Polkadot companion build

* Use newly released primitive-types v0.9.1 that has new codec impls

* Make sure codec deps are up-to-date in crates that use them

Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>

substrate/primitives/core/src/ed25519.rs

@@ -23,7 +23,7 @@
 use sp_std::vec::Vec;
 
 use crate::{hash::H256, hash::H512};
-use codec::{Encode, Decode};
+use codec::{Encode, Decode, MaxEncodedLen};
 
 #[cfg(feature = "full_crypto")]
 use core::convert::TryFrom;
@@ -56,7 +56,7 @@ type Seed = [u8; 32];
 #[cfg_attr(feature = "full_crypto", derive(Hash))]
 #[derive(
 	PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Encode, Decode, Default, PassByInner,
-	max_encoded_len::MaxEncodedLen,
+	MaxEncodedLen,
 )]
 pub struct Public(pub [u8; 32]);