[WIP]feat: lower scheduler's Host GC interval

[BruceAko]

Description

The Host GC method will remove hosts that did not announce in time and their metadata, so the scheduler Host GC interval needs to be lowered in order to detect non-surviving hosts in time.

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Documentation Update (if none of the other choices apply)

Checklist

• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 52.55%. Comparing base (5dee749) to head (3c22d39).

Additional details and impacted files

[](https://app.codecov.io/gh/dragonflyoss/Dragonfly2/pull/3337?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dragonflyoss) ```diff @@ Coverage Diff @@ ## main #3337 +/- ## ========================================== - Coverage 52.69% 52.55% -0.15% ========================================== Files 192 192 Lines 20468 20468 ========================================== - Hits 10786 10757 -29 - Misses 8882 8904 +22 - Partials 800 807 +7 ``` | [Flag](https://app.codecov.io/gh/dragonflyoss/Dragonfly2/pull/3337/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dragonflyoss) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/dragonflyoss/Dragonfly2/pull/3337/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dragonflyoss) | `52.55% <ø> (-0.15%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dragonflyoss#carryforward-flags-in-the-pull-request-comment) to find out more. [see 6 files with indirect coverage changes](https://app.codecov.io/gh/dragonflyoss/Dragonfly2/pull/3337/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dragonflyoss)