fix(controller): project update to private when pass null by api

[goldenxinxing]

Description

Modules

• UI
• Controller
• Client
• Python-SDK
• Others

Checklist

• run code format and lint check
• add unit test
• add necessary doc

[codecov]

Codecov Report

Merging #2943 (a85a954) into main (b6f5301) will decrease coverage by 17.68%.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

@@              Coverage Diff              @@
##               main    #2943       +/-   ##
=============================================
- Coverage     91.81%   74.14%   -17.68%     
- Complexity        0     3071     +3071     
=============================================
  Files           126      421      +295     
  Lines         15118    14803      -315     
  Branches         61     1734     +1673     
=============================================
- Hits          13881    10976     -2905     
- Misses         1235     3035     +1800     
- Partials          2      792      +790     

Flag	Coverage Δ
console	?
controller	74.14% <100.00%> (?)
standalone	?
unittests	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...starwhale/mlops/domain/project/ProjectService.java	73.80% <100.00%> (ø)

... and 546 files with indirect coverage changes

[jialeicui]

LGTM