Making cp as non default when pulling dataset

[ilongin]

Replacing no_cp with cp argument in Catalog.pull_dataset() and setting it to False, meaning we won't cp / instantiate dataset files when pulling it from Studio. If use want's to do instantiation, it needs to explicitly set cp flag to True now.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 87.41%. Comparing base (bdcd01b) to head (f338a8d).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/datachain/catalog/catalog.py	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #720      +/-   ##
==========================================
- Coverage   87.44%   87.41%   -0.03%     
==========================================
  Files         114      114              
  Lines       10898    10898              
  Branches     1499     1499              
==========================================
- Hits         9530     9527       -3     
- Misses        990      992       +2     
- Partials      378      379       +1     

Flag	Coverage Δ
datachain	87.35% <50.00%> (-0.03%)	⬇️

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