[contracts] make debug_message execution outcome invariant to node debug logging setting (#13197)

* update benchmark for seal_debug_message

* add seal_debug_message_per_kb benchmark

* un-fallable debug buffer: silently drops excessive and wrong utf-8 encoded messages

* charge debug_message per byte of the message

* improved benchmark

* cap debug_message

* ".git/.scripts/commands/bench/bench.sh" pallet dev pallet_contracts

* Apply suggestions from code review

Co-authored-by: Alexander Theißen <alex.theissen@me.com>

* fix applied buggy suggestion

* make sure i*1024 < MaxDebugBufferLen

* fix schedule for our non-batched benchmark

* Switch to a `wasmtime` fork with LTO linking failure workaround

* ".git/.scripts/commands/bench/bench.sh" pallet dev pallet_contracts

---------

Co-authored-by: command-bot <>
Co-authored-by: Alexander Theißen <alex.theissen@me.com>
Co-authored-by: Jan Bujak <jan@parity.io>

substrate/frame/contracts/src/lib.rs

@@ -912,8 +912,6 @@ pub mod pallet {
 		///
 		/// This can be triggered by a call to `seal_terminate`.
 		TerminatedInConstructor,
-		/// The debug message specified to `seal_debug_message` does contain invalid UTF-8.
-		DebugMessageInvalidUTF8,
 		/// A call tried to invoke a contract that is flagged as non-reentrant.
 		ReentranceDenied,
 		/// Origin doesn't have enough balance to pay the required storage deposits.