Bump TRT-LLM docker to 1.2.0rc2 (CUDA 13)

[kevalmorabia97]

What does this PR do?

Bump TRT-LLM docker from 1.1.0rc2.post2 (CUDA 12) to 1.2.0rc2 (CUDA 13)

Testing

• Full internal CICD with 1.2.0rc2: https://gitlab-master.nvidia.com/omniml/modelopt/-/pipelines/38808435 (vlm_ptq tests failing for Qwen2-VL)

Before your PR is "Ready for review"

• Make sure you read and follow Contributor guidelines and your commits are signed.
• Is this change backward compatible?: Yes
• Did you write any new necessary tests?: No
• Did you add or update any necessary documentation?: Yes
• Did you update Changelog?: Yes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.44%. Comparing base (c333d36) to head (3cf49a9).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #578      +/-   ##
==========================================
+ Coverage   74.43%   74.44%   +0.01%     
==========================================
  Files         182      182              
  Lines       18234    18234              
==========================================
+ Hits        13572    13575       +3     
+ Misses       4662     4659       -3     

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