Fix add-on store reset

Make sure that add-on store resets do not delete the root folder. This
is important so that successive reset attempts do not fail (the
directory passed to `remove_folder` must exist, otherwise find fails
with an non-zero exit code).

While at it, handle find errors properly and report errors as critical.

supervisor/resolution/fixups/store_execute_reset.py

@@ -1,5 +1,6 @@
 """Helpers to check and fix issues with free space."""
 
+from functools import partial
 import logging
 
 from ...coresys import CoreSys
@@ -40,7 +41,9 @@ class FixupStoreExecuteReset(FixupBase):
             _LOGGER.warning("Can't find store %s for fixup", reference)
             return
 
-        await self.sys_run_in_executor(remove_folder, repository.git.path)
+        await self.sys_run_in_executor(
+            partial(remove_folder, folder=repository.git.path, content_only=True)
+        )
 
         # Load data again
         try:

supervisor/utils/__init__.py

@@ -106,8 +106,7 @@ def remove_folder(
     except OSError as err:
         _LOGGER.exception("Can't remove folder %s: %s", folder, err)
     except subprocess.CalledProcessError as procerr:
-        _LOGGER.error("Can't remove folder %s: %s", folder, procerr.stderr.strip())
-        raise procerr
+        _LOGGER.critical("Can't remove folder %s: %s", folder, procerr.stderr.strip())
 
 
 def remove_folder_with_excludes(