hardcode number of oversized logs

[ghost-not-in-the-shell]

Explain your changes:
This PR just hardcode number of oversized logs. We made such a decision because we want to avoid the circumstance that oversized logs eat too much disk spaces. And by experience, oversized log-rotation refresh slower than regular log-rotations.3 In the testing, we want to increase the number of log-rotation to be 500, and we want to leave most of the space for regular logs instead of having a lot of outdated oversized logs.

Explain how you tested your changes:
*

Checklist:

• Dependency versions are unchanged
  • Notify Velocity team if dependencies must change in CI
• Modified the current draft of release notes with details on what is completed or incomplete within this project
• Document code purpose, how to use it
  • Mention expected invariants, implicit constraints
• Tests were added for the new behavior
  • Document test purpose, significance of failures
  • Test names should reflect their purpose
• All tests pass (CI will check this if you didn't)
• Serialized types are in stable-versioned modules
• Does this close issues? None

[ghost-not-in-the-shell]

!ci-build-me

[ghost-not-in-the-shell]

!ci-build-me

[nholland94]

!approved-for-mainnet