catalystproject-latam: Add a second filstore of 2TB

[sgibson91]

• fixes Create a second filestore instance (of 2TB) for catalystproject-latam #4335

[sgibson91]

tf plan (using targeting to avoid #4374):

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following symbols:
  + create

Terraform will perform the following actions:

  # google_filestore_instance.homedirs["filestore_b"] will be created
  + resource "google_filestore_instance" "homedirs" {
      + create_time = (known after apply)
      + etag        = (known after apply)
      + id          = (known after apply)
      + location    = "southamerica-east1-c"
      + name        = "latam-homedirs-b"
      + project     = "catalystproject-392106"
      + tier        = "BASIC_HDD"
      + zone        = (known after apply)

      + file_shares {
          + capacity_gb   = 2048
          + name          = "homes"
          + source_backup = (known after apply)
        }

      + networks {
          + connect_mode      = "DIRECT_PEERING"
          + ip_addresses      = (known after apply)
          + modes             = [
              + "MODE_IPV4",
            ]
          + network           = "default"
          + reserved_ip_range = (known after apply)
        }
    }