Update to new ChainExtension API

[cmichi]

The ink-waterfall Docker image currently cannot be build because of this.

[paritytech-cicd-pr]

🦑 📈 ink! Example Contracts ‒ Changes Report 📉 🦑

These are the results when building the examples/* contracts from this branch with cargo-contract 1.4.0-25bfb96 and comparing them to ink! master:

	Δ Optimized Size	Δ Used Gas	Total Optimized Size	Total Used Gas
accumulator			1.00 K
adder			2.04 K
contract-introspection			2.32 K
contract-terminate			0.92 K	275_000
contract-transfer			8.31 K	75_000
data-structures			1.73 K
delegate-calls			2.89 K	76_242
delegator			6.34 K	232_135
dns			8.81 K	225_000
erc1155			16.74 K	450_000
erc20			8.42 K	225_000
erc721			11.62 K	600_000
flipper			1.24 K	75_000
forward-calls			2.87 K	151_411
incrementer			1.14 K
mother			12.16 K
multisig			25.28 K	470_240
payment-channel			7.95 K
rand-extension			3.79 K	75_000
seal-code-hash			1.39 K
seal-ecdsa			1.71 K
set-code-hash			1.49 K	150_000
subber			2.06 K
trait-erc20			8.69 K	225_000
trait-flipper			0.97 K	75_000
trait-incrementer			1.12 K	150_000
updated-incrementer			9.72 K
upgradeable-flipper			1.48 K

Link to the run | Last update: Tue Aug 16 09:33:58 CEST 2022