Manage dependencies and add missing einops req

[ksivaman]

Description

Currently the test and install requirements for both frameworks are separately specified in 2 locations, the main setup.py and each of the frameworks' individual setup.py. This may result in bugs such as in #1799 where the transformers test dep was not specified in the framework release build. Also add missing einops dep for pytorch.

Fixes #1766

Type of change

• Documentation change (change only to the documentation, either a fix or a new content)
• 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 not work as expected)
• Infra/Build change
• Code refactoring

Changes

• Consolidate install and test requirements.
• Add missing einops as TE/PyTorch install req.

Checklist:

• I have read and followed the contributing guidelines
• The functionality is complete
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[timmoon10]

LGTM, once we fix the build test issue.

Closes #1766. We no longer need to manually install einops in this build test:

TransformerEngine/.github/workflows/build.yml

Line 84 in f519e6e

run: pip install torch pybind11[global] einops

[ksivaman]

/te-ci