Add support for multi region

[davidlramirez95]

The module should support multi region by specifying:

module "newrelic_node_14_lambda_layer" {  
  source = "git::https://github.com/92green/newrelic-lambda-layer.git?ref=v0.1.0"  
  layer_version = "NewRelicNodeJS14X"  
  region = "ap-southeast-2"
}