Allow the ability to filter by kind when listing apis

[vishalbollu]

Allow users to perform a get operation for a specific API kind. This will reduce burden on the operator.

Notes:

• apiKind can be filter as flag in the CLI and a separate function in the Python Client
• should the list operation only return basic information (only the information in the API spec and CRD?)? Additional information about metrics can be fetched when the API is fetched by name