feat: initialize object storage client in the New func

[gaius-qi]

Description

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov]

Codecov Report

Merging #2682 (19df275) into main (c0522c1) will decrease coverage by 0.01%.
Report is 4 commits behind head on main.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2682      +/-   ##
==========================================
- Coverage   51.89%   51.88%   -0.01%     
==========================================
  Files         157      157              
  Lines       21165    21165              
==========================================
- Hits        10983    10981       -2     
  Misses       9543     9543              
- Partials      639      641       +2     

Flag	Coverage Δ
Object-compatibility-e2etests	?
e2etests	?
unittests	51.88% <ø> (-0.01%)	⬇️

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see 3 files with indirect coverage changes