all: Remove cannon-kona dgv2 feature flags

[Inphi]

To illustrate the change to make cannon-kona and disputegame-v2 the default behavior.

Unresolved Issues

• Should we maintain deploy scripts for V1 dispute games? These scripts may yet be useful for chains that haven't upgraded. While they will always be available in older op-deployer releases, it's quite convenient for the latest op-deployer to support them.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.34%. Comparing base (04297f0) to head (d8731f4).
⚠️ Report is 23 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #18208      +/-   ##
===========================================
- Coverage    76.22%   75.34%   -0.89%     
===========================================
  Files          175      120      -55     
  Lines        10538     6428    -4110     
===========================================
- Hits          8033     4843    -3190     
+ Misses        2359     1585     -774     
+ Partials       146        0     -146     

Flag	Coverage Δ
cannon-go-tests-64	?
contracts-bedrock-tests	75.34% <100.00%> (-6.26%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...es/contracts-bedrock/src/L1/OPContractsManager.sol	89.57% <100.00%> (-5.48%)	⬇️
...ock/src/L1/OPContractsManagerStandardValidator.sol	97.22% <100.00%> (-2.78%)	⬇️
...es/contracts-bedrock/src/libraries/DevFeatures.sol	100.00% <ø> (ø)

... and 58 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.