CCM-11869: ssl module should be conditional

Author: masl2

infrastructure/terraform/components/api/module_supplier_ssl.tf

@@ -1,4 +1,6 @@
 module "supplier_ssl" {
+  count = var.manually_configure_mtls_truststore ? 0 : 1
+
   source = "git::https://github.com/NHSDigital/nhs-notify-shared-modules.git//infrastructure/modules/ssl?ref=v2.0.17"
 
   name           = "sapi_trust"

infrastructure/terraform/components/api/s3_object_placeholder_truststore.tf

@@ -3,8 +3,8 @@ resource "aws_s3_object" "placeholder_truststore" {
   count   = var.manually_configure_mtls_truststore ? 0 : 1
 
   bucket  = local.acct.s3_buckets["truststore"]["id"]
-  key     = "truststore.pem"
-  content = module.supplier_ssl.cacert_pem
+  key     = "${local.csi}/truststore.pem"
+  content = module.supplier_ssl[0].cacert_pem
 
   lifecycle {
     ignore_changes = [