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/frame/support/src/storage/bounded_vec.rs

@@ -20,13 +20,13 @@
 
 use sp_std::prelude::*;
 use sp_std::{convert::TryFrom, fmt, marker::PhantomData};
-use codec::{Encode, Decode, EncodeLike};
+use codec::{Encode, Decode, EncodeLike, MaxEncodedLen};
 use core::{
 	ops::{Deref, Index, IndexMut},
 	slice::SliceIndex,
 };
 use crate::{
-	traits::{Get, MaxEncodedLen},
+	traits::Get,
 	storage::{StorageDecodeLength, StorageTryAppend},
 };