feature: support opsgenie in logdna_view

[zoezhangmattr]

│ Warning: The remote view resource contains an unsupported integration: opsgenie
│ 
│   with logdna_view.xxx,
│   on main.tf line 1, in resource "logdna_view" "xxx":
│   1: resource "logdna_view" "xxx" {
│ 
│ opsgenie integration ignored since it does not map to the schema

try to import existent view with opsgenie confgured, after import and run a plan, seems like it doesnt support opsgenie

it would be nice to support it , thanks