[1.6.1] Explicitly cast incorrect output type in OV model

[sovrasov]

Summary

This workarounds incorrect type of "labels" output in detection models on XPU

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 80.72%. Comparing base (6d5cf9c) to head (db20829).

Files	Patch %	Lines
src/otx/algorithms/common/utils/ir.py	33.33%	6 Missing ⚠️

Additional details and impacted files

@@                Coverage Diff                 @@
##           releases/1.6.0    #3395      +/-   ##
==================================================
- Coverage           80.73%   80.72%   -0.01%     
==================================================
  Files                 536      536              
  Lines               40491    40500       +9     
==================================================
+ Hits                32691    32695       +4     
- Misses               7800     7805       +5     

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[chuneuny-emily]

@sovrasov - Can you fix the failing issue?

[sovrasov]

@sovrasov - Can you fix the failing issue?

I'll restart the CI, there's an instability in the runner

[yunchu]

@sovrasov please don't forget to update changelog.md for your change.
@eunwoosh @kprokofi please don't forget to check whether changelog.md are updated as reviewer especially the target branch is release branch.