Upgradability improvements and bumped hardhat-deploy

[jaybuidl]

• More test coverage of the proxies
• Fixes in the deployment scripts
• Make use of the new hardhat-deploy version containing @zmalatrax's merged PR feat(proxy): implements custom upgrade function wighawag/hardhat-deploy#479

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PR-Codex overview

Focus:

This PR focuses on upgrading the deployment scripts and making changes to various contracts related to proxies and upgradability.

Detailed summary:

• Upgraded the deployment scripts to use deployments instead of hre for deployment.
• Updated the deployUpgradable function calls to use deployments instead of hre.
• Updated the contract imports in various files.
• Updated the version of hardhat-deploy to 0.11.42 in the package.json file.
• Added the Initializable contract import to the Constants.sol file.
• Updated the SPDX license identifier in the UpgradedByRewrite.sol and UpgradedByRewriteV2.sol files.
• Made changes to the UpgradedByRewrite.sol and UpgradedByRewriteV2.sol contracts related to the implementation and state variables.
• Added the IERC20 contract import to the Constants.sol file.
• Made changes to the UpgradedByInheritanceV1.sol and UpgradedByInheritanceV2.sol contracts related to the implementation and state variables.
• Updated the hardhat-deploy version in the yarn.lock file.

The following files were skipped due to too many changes: contracts/src/proxy/mock/by-inheritance/UpgradedByInheritance.sol, contracts/src/gateway/ForeignGateway.sol, contracts/deploy/00-home-chain-arbitration.ts, contracts/src/gateway/HomeGateway.sol, contracts/deploy/utils/deployUpgradable.ts, contracts/src/arbitration/KlerosCore.sol, contracts/test/proxy/index.ts

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
2 Code Smells

No Coverage information
0.8% Duplication

[codeclimate]

Code Climate has analyzed commit 51ef929 and detected 1 issue on this pull request.

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