Add integration tests and integration testing setup (PE-1115)

[juliaaschmidt]

Integration Tests + Integration Testing Deployment Setup PE-1115

• adds a new complete Integration Test Deployment Setup (incl. TUPProxy and Firewall) DeploymentFixture.sol .
• refactors repeatedly used helper functions from previous unit tests into a separate helpers file utils/RiverTestHelper.sol
• adds new helper functions to support the Integration Testing utils/IntegrationTestHelpers.sol
• adds separate events files to import expected events into tests rather than importing or declaring inline utils/events/
• adds 3 integration test files
  • Deployment Deployment.t.sol
  • Deposit DepositIntegration.t.sol
  • Oracle OracleIntegration.t.sol
  • Withdraw WithdrawIntegration.t.sol
• refactors River.1.t.sol and OracleManager.1.t.sol to inherit from RivherTestHelper instead of code duplication.
• refactored the old deployment setup (RiverV1TestBase contract) used for unit tests inside River and Oracle to RiverUnitTestBase.sol to avoid code duplication and import common standards

• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Have you assigned this PR to yourself?
• Have you added at least 1 reviewer?
• Have you updated the official documentation?
• Have you added sufficient documentation in your code?
• Have you added relevant tests to the official test suite?

Pull Request Type

• 💫 New Feature (Breaking Change)
• 💫 New Feature (Non-breaking Change)
• 🛠️ Bug fix (Non-breaking Change: Fixes an issue)
• 🕹️ Chore (Non-breaking Change: Doc updates, pkg upgrades, typos, etc..)

Breaking changes (if applicable)

Testing

• Have you tested this code with the official test suite?
• Have you tested this code manually?

Manual tests (if applicable)

Additional comments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.20%. Comparing base (968a3a3) to head (35d8aa1).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #295      +/-   ##
==========================================
+ Coverage   95.03%   95.20%   +0.16%     
==========================================
  Files          75       75              
  Lines        1773     1773              
  Branches      235      235              
==========================================
+ Hits         1685     1688       +3     
+ Misses         29       27       -2     
+ Partials       59       58       -1     

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[mischat]

@juliaaschmidt do we still want to get this PR merged in ? It is still relevant ? If so, could you please fix the conflict, and lets try and get it merged in