Add Arista-7060X6-64DE-O128S2 and Arista-7060X6-64PE-C224O8 HWSKUs

[ccroy-arista]

Description of PR

Summary:
Fixes # (issue)

Add the necessary support files for the Arista-7060X6-64DE-O128S2 and Arista-7060X6-64PE-C224O8 hwskus to sonic-mgmt.

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• Test case(new/improvement)

Back port request

• 202012
• 202205
• 202305
• 202311
• 202405

Approach

What is the motivation for this PR?

To support sonic-mgmt testing for the Arista-7060X6-64DE-O128S2 and Arista-7060X6-64PE-C224O8 hwskus.

How did you do it?

Added the necessary ansible variable/port util definitions for these hwskus.

How did you verify/test it?

Verified the testbed can be successfully configured and the sonic-mgmt suite of tests can be run against these hwskus.

Any platform specific information?

This targets the Arista-7060X6-64DE-O128S2 and Arista-7060X6-64PE-C224O8 hwskus.

[mssonicbld]

The pre-commit check detected issues in the files touched by this pull request.
The pre-commit check is a mandatory check, please fix detected issues.

Detailed pre-commit check results:
trim trailing whitespace.................................................Passed
fix end of files.........................................................Passed
check yaml...........................................(no files to check)Skipped
check for added large files..............................................Passed
check python ast.........................................................Passed
flake8...................................................................Failed
- hook id: flake8
- exit code: 1

ansible/module_utils/port_utils.py:133:51: E261 at least two spaces before inline comment

flake8...............................................(no files to check)Skipped
check conditional mark sort..........................(no files to check)Skipped

To run the pre-commit checks locally, you can follow below steps:

1. Ensure that default python is python3. In sonic-mgmt docker container, default python is python2. You can run
   the check by activating the python3 virtual environment in sonic-mgmt docker container or outside of sonic-mgmt
   docker container.
2. Ensure that the pre-commit package is installed:

sudo pip install pre-commit

3. Go to repository root folder
4. Install the pre-commit hooks:

pre-commit install

5. Use pre-commit to check staged file:

pre-commit

6. Alternatively, you can check committed files using:

pre-commit run --from-ref <commit_id> --to-ref <commit_id>