🧪 Allow glob patterns in retrieve_temporary input

The `generate_calc_job_node` fixture has a `retrieve_temporary` input that allows the
user to specify a list of files in the fixture test folder that should be copied to
the temporary retrieved folder (as defined by the `_retrieve_temporary_list` class
attribute in the corresponding calculation job). Here we extend this functionality to
allow the user to specify glob patterns in the `retrieve_temporary` input.

Second, we also adapt the code to use the `pathlib` module for handling paths. While
doing so, we also revert a change in 0874d95 that
introduced a try-except to handle the case where the XML is not in the fixture test
folder. This is no longer necessary, because the `glob` call will only return files that
are actually present in the fixture test folder.

tests/conftest.py

@@ -5,6 +5,7 @@
 import io
 import os
 import pathlib
+from pathlib import Path
 import shutil
 import tempfile
 
@@ -287,23 +288,22 @@ def _generate_calc_job_node(
 
         if retrieve_temporary:
             dirpath, filenames = retrieve_temporary
+            dirpath = Path(dirpath)
+            filepaths = []
             for filename in filenames:
-                try:
-                    shutil.copy(os.path.join(filepath_folder, filename), os.path.join(dirpath, filename))
-                except FileNotFoundError:
-                    pass  # To test the absence of files in the retrieve_temporary folder
+                filepaths.extend(Path(filepath_folder).glob(filename))
+
+            for filepath in filepaths:
+                shutil.copy(filepath, dirpath / filepath.name)
 
         if filepath_folder:
             retrieved = orm.FolderData()
             retrieved.base.repository.put_object_from_tree(filepath_folder)
 
             # Remove files that are supposed to be only present in the retrieved temporary folder
             if retrieve_temporary:
-                for filename in filenames:
-                    try:
-                        retrieved.base.repository.delete_object(filename)
-                    except OSError:
-                        pass  # To test the absence of files in the retrieve_temporary folder
+                for filepath in filepaths:
+                    retrieved.delete_object(filepath.name)
 
             retrieved.base.links.add_incoming(node, link_type=LinkType.CREATE, link_label='retrieved')
             retrieved.store()