feat(data_sources): warehouse exposing MCON's implementation

[ndopj]

Initial implementation of data resource montecarlo_warehouse.
This resource is responsible for collecting all of the assets in the given Monte Carlo warehouse and mapping them to their MCON's (Monte Carlo universal identifier (if you're familiar with AWS you can think of it like the ARN)).

Such functionality is very beneficial in all of the resources that accept data asset's MCON's in one of their input arguments since user will not provide MCON's translation by themselves.

• Example usage of domains without data resource warehouse:

resource "montecarlo_domain" "example_assignments" {
  name        = "name"
  description = "description"
  assignments = [
    "MCON++a84380ed-b962-4bd3-b150-04bc38a209d5++427a1600-2653-40c5-a1e7-5ec98703ee9d++project++gcp-project1-722af1c6",
    "MCON++a84380ed-b962-4bd3-b150-04bc38a209d5++e7c59fd6-7ca8-41e7-8325-062ea38d3df5++dataset++postgre-dataset-1"
  ]
}

• Example usage of domains with data resource warehouse

data "montecarlo_warehouse" "example" {
  uuid = "af73e512-dcbc-48c6-aeec-af9e7fa09f34"
}

resource "montecarlo_domain" "example_assignments" {
  name        = "name"
  description = "description"
  assignments = [
    data.montecarlo_warehouse.example.projects["gcp-project1-722af1c6"].mcon,
    data.montecarlo_warehouse.example.projects["gcp-project2-544ce4d7"].datasets["postgre-dataset-1"].mcon
  ]
}