chore(contracts): Fix lint issues on contracts

[alainncls]

What does this PR do?

• Updates Solhint
• Fixes linting issues on the contracts
• Switches unnecessary memory to calldata

Related ticket

Fixes #811

Type of change

• Chore
• Bug fix
• New feature
• Documentation update

Check list

• Unit tests for any smart contract change
• Contracts and functions are documented

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.88%. Comparing base (6725ef2) to head (34c1bd2).

Additional details and impacted files

@@             Coverage Diff             @@
##              dev     #812       +/-   ##
===========================================
+ Coverage   48.96%   74.88%   +25.91%     
===========================================
  Files          18       49       +31     
  Lines         388      888      +500     
  Branches       61      182      +121     
===========================================
+ Hits          190      665      +475     
- Misses        195      220       +25     
  Partials        3        3               

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