test: introduce unstable fuzz create table test

[WenyXu]

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?

The unstable fuzz test for standalone will kill the GreptimeDB process randomly. The unstable_fuzz_create_table test tries to verify the atomicity of the create table procedure.

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR does not require documentation updates.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 68 lines in your changes are missing coverage. Please review.

Project coverage is 85.24%. Comparing base (6957461) to head (c60f5b7).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3788      +/-   ##
==========================================
- Coverage   85.58%   85.24%   -0.35%     
==========================================
  Files         955      957       +2     
  Lines      163466   163532      +66     
==========================================
- Hits       139905   139401     -504     
- Misses      23561    24131     +570     

[fengjiachun]

LGTM