fix: remove ResourceWarning from using TemporaryDirectory

We currently have something like `var = TemporaryDirectory`
without explicitly calling the `close` method on `var` thus
raising a `ResourceWarning` when the resource is implicitely cleaned-up.

This could be avoided by using `mkdtemp` instead.

frontends/concrete-python/concrete/fhe/compilation/server.py

@@ -189,10 +189,8 @@ def create(
             if configuration.compiler_verbose_mode:  # pragma: no cover
                 set_compiler_logging(True)
 
-            # pylint: disable=consider-using-with
-            output_dir = tempfile.TemporaryDirectory()
-            output_dir_path = Path(output_dir.name)
-            # pylint: enable=consider-using-with
+            output_dir = tempfile.mkdtemp()
+            output_dir_path = Path(output_dir)
 
             support = LibrarySupport.new(
                 str(output_dir_path), generateCppHeader=False, generateStaticLib=False