feat(fabricType): add fabric type RVW

[eboneil]

Checklist

• The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• Links to related issues (if applicable)
• Tests for the changes have been added/updated (if applicable)
• Docs related to the changes have been added/updated (if applicable). If a new feature has been added a Usage Guide has been added for the same.
• For any breaking change/potential downtime/deprecation/big changes an entry has been made in Updating DataHub

[anshbansal]

• this would be a backward incompatible change in case someone pushed this FabricType so add in https://github.com/datahub-project/datahub/blob/master/docs/how/updating-datahub.md as no rollbacks allowed once the data is in without manual cleanups in databases
• please follow the commit message format https://github.com/datahub-project/datahub/blob/master/docs/CONTRIBUTING.md#commit-message-format