[DIOPI] fix adamw test when amsgrad is False

[POI-WX]

Motivation and Context

• Fix diopi test for adamw op when amsgrad is False.
• Temporarily skip all test cases for adamw op on camb due to the kernel bug.

Description

Use cases (Optional)

BC-breaking (Optional)

Checklist

Before PR:

• [x] I have read and followed the workflow indicated in the Contributors.md to create this PR.
• [x] Pre-commit or linting tools indicated in Contributors.md are used to fix the potential lint issues.
• [x] Bug fixes are covered by unit tests, the case that causes the bug should be added in the unit tests.
• [x] New functionalities are covered by complete unit tests. If not, please add more unit test to ensure the correctness.
• [x] The documentation has been modified accordingly, including docstring or example tutorials.

After PR:

• [x] CLA has been signed and all committers have signed the CLA in this PR.