Liquid-locking: Add unbond event and upgrade func

[CostinCarabas]

No description provided.

[github-actions]

Contract comparison - from 7e6df3d to 600e60e

Path	size	has-allocator	has-format
mx-contracts-rs/contracts
- adder/adder.wasm	695	No	No
- bonding-curve-contract/bonding-curve-contract.wasm	15688	No	No
- check-pause/check-pause.wasm	1227	No	No
- crowdfunding-esdt/crowdfunding-esdt.wasm	3612	No	No
- crypto-bubbles/crypto-bubbles.wasm	2364	No	No
- crypto-zombies/crypto-zombies.wasm	11131	No	No
- digital-cash/digital-cash.wasm	7370	No	No
- empty/empty.wasm	232	No	No
- esdt-transfer-with-fee/esdt-transfer-with-fee.wasm	9094	No	No
- factorial/factorial.wasm	577	No	No
- fractional-nfts/fractional-nfts.wasm	8712	No	No
- liquid-locking/liquid-locking.wasm	10250 ➡️ 10305 🔴	No	No
- lottery-esdt/lottery-esdt.wasm	11385	No	No
- multisig
- - multisig.wasm	15292	No	No
- - multisig-full.wasm	17296	No	No
- - multisig-view.wasm	7689	No	No
- mvx-game-sc/mvx-game-sc.wasm	11137	No	No
- mystery-box/mystery-box.wasm	13783	No	No
- nft-escrow/nft-escrow.wasm	7327	No	No
- nft-minter/nft-minter.wasm	10237	No	No
- nft-storage-prepay/nft-storage-prepay.wasm	2293	No	No
- paymaster/paymaster.wasm	7509	No	No
- ping-pong-egld/ping-pong-egld.wasm	6696	No	No
- price-aggregator/multiversx-price-aggregator-sc.wasm	20328	No	No
- proxy-pause/proxy-pause.wasm	5757	No	No
- rewards-distribution/rewards-distribution.wasm	11259	No	No
- seed-nft-minter/seed-nft-minter.wasm	15343	No	No
- token-release/token-release.wasm	8466	No	No
- wegld-swap/multiversx-wegld-swap-sc.wasm	4382	No	No
mx-contracts-rs/contracts/crypto-kitties
- kitty-auction/kitty-auction.wasm	11134	No	No
- kitty-genetic-alg/kitty-genetic-alg.wasm	3584	No	No
- kitty-ownership/kitty-ownership.wasm	14005	No	No
mx-contracts-rs/contracts/order-book
- factory/order-book-factory.wasm	4995	No	No
- pair/order-book-pair.wasm	16426	No	No