ci: cargo gc fuzz test runner

[waynexia]

I hereby agree to the terms of the GreptimeDB CLA.

Refer to a related PR or issue link (optional)

What's changed and what's your intention?

fuzz test are build in-place and will sometimes out of space: https://github.com/GreptimeTeam/greptimedb/actions/runs/9299629767/job/25594353223

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR requires documentation updates.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.05%. Comparing base (0575108) to head (86cf890).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4074      +/-   ##
==========================================
- Coverage   85.35%   85.05%   -0.31%     
==========================================
  Files         987      987              
  Lines      172119   172119              
==========================================
- Hits       146908   146389     -519     
- Misses      25211    25730     +519