BUG: fix df deep copy

[ChengjieLi28]

What do these changes do?

Related issue number

Fixes #443
Fixes #700

Check code requirements

• tests added / passed (if needed)
• Ensure all linting tests pass

[codecov]

Codecov Report

Merging #709 (3f86922) into main (384e453) will increase coverage by 0.03%.
The diff coverage is 97.43%.

@@            Coverage Diff             @@
##             main     #709      +/-   ##
==========================================
+ Coverage   93.52%   93.56%   +0.03%     
==========================================
  Files        1025     1025              
  Lines       79373    79405      +32     
  Branches    16443    16453      +10     
==========================================
+ Hits        74232    74293      +61     
+ Misses       3459     3431      -28     
+ Partials     1682     1681       -1     

Flag	Coverage Δ
unittests	93.45% <97.43%> (+0.03%)	⬆️

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

Files Changed	Coverage Δ
python/xorbits/_mars/core/entity/tileables.py	89.90% <94.73%> (+0.27%)	⬆️
python/xorbits/_mars/core/base.py	99.00% <100.00%> (ø)
python/xorbits/_mars/dataframe/core.py	94.26% <100.00%> (+0.38%)	⬆️
python/xorbits/_mars/deploy/oscar/session.py	95.12% <100.00%> (+0.04%)	⬆️
python/xorbits/core/adapter.py	97.59% <100.00%> (+0.01%)	⬆️

... and 11 files with indirect coverage changes

[qinxuye]

LGTM