Add terraform files and config for GCP

Signed-off-by: Somtochi Onyekwere <somtochionyekwere@gmail.com>

tests/integration/terraform/gcp/variables.tf

@@ -0,0 +1,37 @@
+variable "gcp_project_id" {
+  type        = string
+  description = "GCP project to create the resources in"
+}
+
+variable "gcp_email" {
+  type        = string
+  description = "GCP email"
+}
+
+variable "gcp_region" {
+  type        = string
+  default     = "us-central1"
+  description = "GCP region"
+}
+
+variable "gcp_zone" {
+  type        = string
+  default     = "us-central1"
+  description = "GCP region"
+}
+
+
+variable "gcp_keyring" {
+  type        = string
+  description = "GCP keyring that contains crypto key for encrypting secrets"
+}
+
+variable "gcp_crypto_key" {
+  type        = string
+  description = "GCP crypto key for encrypting secrets"
+}
+
+variable "tags" {
+  type    = map(string)
+  default = {}
+}