[NRL-1386] Make lambda subscription filters unique per firehose stream

Author: mattdean3-nhs

terraform/infrastructure/modules/lambda/cloudwatch.tf

@@ -7,7 +7,7 @@ resource "aws_cloudwatch_log_group" "lambda_cloudwatch_log_group" {
 resource "aws_cloudwatch_log_subscription_filter" "lambda_log_filter" {
   for_each = var.firehose_subscriptions
 
-  name            = "${aws_lambda_function.lambda_function.function_name}_filter"
+  name            = "${aws_lambda_function.lambda_function.function_name}_${each.key}_filter"
   log_group_name  = aws_cloudwatch_log_group.lambda_cloudwatch_log_group.name
   role_arn        = each.value.role.arn
   destination_arn = each.value.destination.arn