upgradeable contracts

[dorin-iancu]

Also deleted old cargo.lock files.

[github-actions]

Contract comparison - from a94a332 to 13d4b5d

Path	size	has-allocator	has-format
mx-exchange-sc
- pause-all/pause-all.wasm	5438 ➡️ 5448 🔴	No	No
mx-exchange-sc/dex
- farm/farm.wasm	38690 ➡️ 38712 🔴	No	No
- farm-with-locked-rewards/farm-with-locked-rewards.wasm	38299 ➡️ 38321 🔴	No	No
- governance/governance.wasm	17283 ➡️ 17305 🔴	No	No
- pair
- - pair.wasm	30513 ➡️ 30534 🔴	No	No
- - pair-full.wasm	31962 ➡️ 31983 🔴	No	No
- - safe-price-view.wasm	7862	No	No
- pair-mock/pair-mock.wasm	5474	No	No
- price-discovery/price-discovery.wasm	16254 ➡️ 16275 🔴	No	No
- proxy-deployer/proxy-deployer.wasm	4457 ➡️ 4477 🔴	No	No
- router/router.wasm	25991 ➡️ 26012 🔴	No	No
mx-exchange-sc/energy-integration
- energy-factory-mock/energy-factory-mock.wasm	4233	No	No
- energy-update/energy-update.wasm	1510 ➡️ 1520 🔴	No	No
- fees-collector/fees-collector.wasm	18531 ➡️ 18552 🔴	No	No
- governance-v2/governance-v2.wasm	16693 ➡️ 16715 🔴	No	No
mx-exchange-sc/farm-staking
- farm-staking/farm-staking.wasm	42863 ➡️ 42885 🔴	No	No
- farm-staking-proxy/farm-staking-proxy.wasm	18629 ➡️ 18650 🔴	No	No
- metabonding-staking/metabonding-staking.wasm	9593 ➡️ 9614 🔴	No	No
mx-exchange-sc/locked-asset
- distribution/distribution.wasm	14358 ➡️ 14379 🔴	No	No
- energy-factory/energy-factory.wasm	34616 ➡️ 34638 🔴	No	No
- factory/factory.wasm	30375 ➡️ 30396 🔴	No	No
- lkmex-transfer/lkmex-transfer.wasm	11214 ➡️ 11235 🔴	No	No
- locked-token-wrapper/locked-token-wrapper.wasm	14291 ➡️ 14312 🔴	No	No
- proxy_dex/proxy_dex.wasm	35372 ➡️ 35393 🔴	No	No
- simple-lock/simple-lock.wasm	24112 ➡️ 24123 🔴	No	No
- simple-lock-whitelist/simple-lock-whitelist.wasm	25758 ➡️ 25780 🔴	No	No
- token-unstake/token-unstake.wasm	13625 ➡️ 13646 🔴	No	No