[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

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