Lists service tiers that can be used to create Google Cloud SQL instances.
list(project)
  Lists service tiers that can be used to create Google Cloud SQL instances.
Args:
  project: string, Project ID of the project for which to list tiers. (required)
Returns:
  An object of the form:
    { # Tiers list response.
    "items": [ # List of tiers.
      { # A Google Cloud SQL service tier resource.
        "DiskQuota": "A String", # The maximum disk size of this tier in bytes.
        "tier": "A String", # An identifier for the service tier, for example D1, D2 etc. For related information, see Pricing.
        "kind": "sql#tier", # This is always sql#tier.
        "RAM": "A String", # The maximum RAM usage of this tier in bytes.
        "region": [ # The applicable regions for this tier. Can be us-east1, europe-west1, or asia-east1.
          "A String",
        ],
      },
    ],
    "kind": "sql#tiersList", # This is always sql#tiersList.
  }