feat: remove object storage and model message

[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

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (eb9a92a) 51.03% compared to head (2c61fa6) 51.45%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2992      +/-   ##
==========================================
+ Coverage   51.03%   51.45%   +0.42%     
==========================================
  Files         162      162              
  Lines       22349    22171     -178     
==========================================
+ Hits        11405    11408       +3     
+ Misses      10283    10105     -178     
+ Partials      661      658       -3     

Flag	Coverage Δ
Object-compatibility-e2etests	?
e2etests	?
unittests	51.45% <0.00%> (+0.42%)	⬆️

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

Files	Coverage Δ
scheduler/service/service_v2.go	85.09% <ø> (+0.23%)	⬆️
manager/rpcserver/rpcserver.go	0.00% <0.00%> (ø)
manager/rpcserver/manager_server_v2.go	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes