Meru400bia: update ports and profiles in platform mapping, add link test config

[adamcalabrigo]

Summary

Changes:

• Extending Meru400bia platform mapping to include all ports and 100G-4 profiles.
• Updating Meru400bia hw test config to account for mapping change
• Adding Meru400bia link test config

Testing

OSS build succeeds.

[facebook-github-bot]

@harshitgulati18 has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[facebook-github-bot]

@harshitgulati18 merged this pull request in facebook/fboss@015f8d8c1a2e1d9e792bede06617ea2d2e14a7f1.