fix: fix procedure loaders not found issue

[WenyXu]

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

1. Fix procedure loaders not found issue.
2. Add unit test to ensure all loaders are registered.

The procedure LocalManager needs a Loader to convert the serialized data to an executable one. However, Before this PR, in the standalone mode, we didn't register these loaders🥲

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.

Refer to a related PR or issue link (optional)

fix #2823

[codecov]

Codecov Report

Merging #2824 (09c3939) into develop (0badb37) will decrease coverage by 0.40%.
Report is 1 commits behind head on develop.
The diff coverage is 84.50%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2824      +/-   ##
===========================================
- Coverage    84.78%   84.38%   -0.40%     
===========================================
  Files          734      734              
  Lines       114940   115111     +171     
===========================================
- Hits         97450    97142     -308     
- Misses       17490    17969     +479     

[zhongzc]

LGTM