feat: remove otel in client

[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.

[jim3ma]

LGTM

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.86%. Comparing base (67bb7a6) to head (c3c419d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3169      +/-   ##
==========================================
- Coverage   51.87%   51.86%   -0.02%     
==========================================
  Files         163      163              
  Lines       18672    18675       +3     
==========================================
- Hits         9687     9686       -1     
- Misses       8308     8312       +4     
  Partials      677      677              

Flag	Coverage Δ
unittests	51.86% <100.00%> (-0.02%)	⬇️

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

Files	Coverage Δ
scheduler/resource/resource.go	64.28% <100.00%> (ø)

... and 2 files with indirect coverage changes