Make PyTorch 2.7 as Default and Add Compatibility for PyTorch 2.10

[mhs4670go]

What

Currently, the framework installs and targets PyTorch 2.6 by default.

This issue would like to:

• Upgrade the default supported PyTorch version to 2.7
• Add explicit compatibility and CI coverage for PyTorch 2.10

This is to stay aligned with upstream PyTorch releases and ensure long-term compatibility as users adopt newer versions.

Related: #438

[dayo09]

NOTE: Internal coverage report sets environment in only pytorch 2.6.

Main unittests are sturdier than model coverage test. We may need to add model coverage tests on more pytorch/transformers variety.