added support 2nd generation cloud function (#872)

* added support 2nd generation cloud function

* changed function_version to a simple boolean v2
removed memory_2ndGen

* will use the var.v2 to add the invoker role

* removed the list uisng compact and formated the code

* formated the code and added conditional feature

* formated the code

* added formating

* resolved the merge conflict

* Update readme

* Create local function object

* added secret_volumes
and secret_environment_variables for CF V2

Co-authored-by: Julio Castillo <jccb@google.com>

modules/cloud-function/variables.tf

@@ -54,7 +54,7 @@ variable "function_config" {
   type = object({
     entry_point = string
     instances   = number
-    memory      = number
+    memory      = number # Memory in MB
     runtime     = string
     timeout     = number
   })
@@ -160,3 +160,9 @@ variable "vpc_connector_config" {
   default = null
 }
 
+variable "v2" {
+  description = "Whether to use Cloud Function version 2nd Gen or 1st Gen."
+  type        = bool
+  default     = false
+}
+