[FIX] base: avoid no autoinstall propagation

A custom script is modifying the output of
load_information_from_description_file to disable the
auto-install of modules during local testing. It was naively adapted for
v16.0 by replacing the corresponding methods. Since a lru cache was added
(nice optimization in most cases) this is an issue because running lint
test afterward will get the cached value with an incorrect autoinstall
value. It makes sens to avoid reading the file on the filesystem each
time, but making a deepcopy looks like an acceptable safeguard to avoid
hard to debug behaviors.

closes odoo/odoo#143628

X-original-commit: ad10ff4410ccf7c38f6154480484495bb57c53ff
Signed-off-by: Julien Castiaux (juc) <juc@odoo.com>
Signed-off-by: Xavier Dollé (xdo) <xdo@odoo.com>

odoo/modules/module.py

@@ -312,6 +312,7 @@ def load_manifest(module, mod_path=None):
         return {}
 
     manifest = copy.deepcopy(_DEFAULT_MANIFEST)
+
     manifest['icon'] = get_module_icon(module)
 
     with tools.file_open(manifest_file, mode='r') as f:
@@ -352,7 +353,6 @@ def load_manifest(module, mod_path=None):
 
     return manifest
 
-@functools.lru_cache(maxsize=None)
 def get_manifest(module, mod_path=None):
     """
     Get the module manifest.
@@ -365,6 +365,10 @@ def get_manifest(module, mod_path=None):
         when the manifest was not found.
     :rtype: dict
     """
+    return copy.deepcopy(_get_manifest_cached(module, mod_path))
+
+@functools.lru_cache(maxsize=None)
+def _get_manifest_cached(module, mod_path=None):
     return load_manifest(module, mod_path)
 
 def load_information_from_description_file(module, mod_path=None):