Enhance ExtractDataKeyFromMetaKeyd to work with MetaTensor

[AdamaSorho]

Fixes #7562 .

Description

This pull request improves ExtractDataKeyFromMetaKey, enabling it to extract keys from a MetaTensor.

Types of changes

• [x] Non-breaking change (fix or new feature that would not break existing functionality).
• [ ] Breaking change (fix or new feature that would cause existing functionality to change).
• [ x] New tests added to cover the changes.
• [x ] Integration tests passed locally by running ./runtests.sh -f -u --net --coverage.
• [ x] Quick tests passed locally by running ./runtests.sh --quick --unittests --disttests.
• [ ] In-line docstrings updated.
• [ ] Documentation updated, tested make html command in the docs/ folder.