feat: migrate to new monv2 action api (part 1: add new params)

[obs-gh-owengoebel]

No description provided.

[vikramraman]

Also the tests are failing with:

error=
  | Error running pre-apply refresh: exit status 1
  | 
  | Error: Unsupported block type
  | 
  |   on terraform_plugin_test.tf line 63, in resource "observe_monitor_v2_action" "act":
  |   63: \t\t\t\t\t\tdestination {
  | 
  | Blocks of type "destination" are not expected here. Did you mean to define
  | argument "destination"? If so, use the equals sign to assign it a value.