fix(syncer): lowercase distribution_bucket_name (#3194)

refactor: lowercase distribution_bucket_name

Prefix may contain uppercase characters that will
break the distribution bucket name validation

Author: dmitrykiselev27

Diff for: main.tf

@@ -282,7 +282,7 @@ module "runner_binaries" {
   prefix = var.prefix
   tags   = local.tags
 
-  distribution_bucket_name = "${var.prefix}-dist-${random_string.random.result}"
+  distribution_bucket_name = lower("${var.prefix}-dist-${random_string.random.result}")
   s3_logging_bucket        = var.runner_binaries_s3_logging_bucket
   s3_logging_bucket_prefix = var.runner_binaries_s3_logging_bucket_prefix