Chore: hclfmt deprecation

`hclfmt` is being deprecated and terragrunt produces a warning on execution,
 See https://github.com/gruntwork-io/terragrunt/releases/tag/v0.78.0

     Fix :
    ```
    WARN   The `hclfmt` command is deprecated and will be removed in a future version of Terragrunt. Use `terragrunt hcl format` instead.
    ```

Author: rottj006

hooks/terragrunt_fmt.sh

@@ -46,7 +46,7 @@ function per_dir_hook_unique_part {
   local -a -r args=("$@")
 
   # pass the arguments to hook
-  terragrunt hclfmt "${args[@]}"
+  terragrunt hcl format "${args[@]}"
 
   # return exit code to common::per_dir_hook
   local exit_code=$?