feat: add pubsub as module to align to revamp

storage/gcp/pubsub/main.tf

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+#main

storage/gcp/pubsub/outputs.tf

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+output "env" {
+  description = "Elements to be set as environment variables"
+  value = ({
+    "Components__QueueAdaptorSettings__ClassName"           = "ArmoniK.Core.Adapters.PubSub.QueueBuilder"
+    "Components__QueueAdaptorSettings__AdapterAbsolutePath" = "/adapters/queue/pubsub/ArmoniK.Core.Adapters.PubSub.dll"
+    "PubSub__ProjectId"                                     = var.project_id
+    "PubSub__KmsKeyName"                                    = var.kms_key_id
+  })
+}

storage/gcp/pubsub/variables.tf

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+variable "project_id" {
+  description = "Id of the google project"
+  type        = string
+}
+
+variable "kms_key_id" {
+  description = "Id of the crypto KMS used to encrypt/decrypt resources"
+  type        = string
+}

storage/gcp/pubsub/versions.tf

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+terraform {
+  required_version = ">= 1.0"
+}