Add interconnect attachment state waiting (#327)
Add interconnect attachment state waiting (#327)

Signed-off-by: Modular Magician <86ce7da8ad74b1c583667a2bebd347455fa06219@google.com>

Co-authored-by: Riley Karson <1a773f0ad84731b4060512d017ba233db35a9279@google.com>

GoogleCloudPlatform/terraform-google-conversion