feat: change postgres version to variable

Author: zbpvarun-tamr

main.tf

@@ -10,7 +10,7 @@ resource "google_sql_database_instance" "tamr" {
   project = var.project_id
   region  = var.region
   # NOTE: this is pinned as its the version that tamr needs
-  database_version = "POSTGRES_12"
+  database_version = var.postgres_version
 
   deletion_protection = var.deletion_protection
 

variables.tf

@@ -118,3 +118,9 @@ variable "ssl_mode" {
   description = "Set up the SSL mode. If SSL is required, this value is TRUSTED_CLIENT_CERTIFICATE_REQUIRED."
   default     = "ALLOW_UNENCRYPTED_AND_ENCRYPTED"
 }
+
+variable "postgres_version" {
+  type        = string
+  description = "Version of Postgres to install on the CloudSQL instance"
+  default     = "POSTGRES_12"
+}