[FIX] base: do not overwrite noupdate translations

If a record is tagged with no update, the translations must not be replaced,
even if the "overwrite translation" checkbox is checked.

If somebody renames a noupdate and translated record, updating the translations
must keep the new translations.

Closes #14768

odoo/addons/base/ir/ir_translation.py

@@ -47,7 +47,8 @@ class IrTranslationImport(object):
         # of ir_translation, so this copy will be much faster.
         query = """ CREATE TEMP TABLE %s (
                         imd_model VARCHAR(64),
-                        imd_name VARCHAR(128)
+                        imd_name VARCHAR(128),
+                        noupdate BOOLEAN
                     ) INHERITS (%s) """ % (self._table, self._model_table)
         self._cr.execute(query)
 
@@ -104,7 +105,8 @@ class IrTranslationImport(object):
 
         # Step 1: resolve ir.model.data references to res_ids
         cr.execute(""" UPDATE %s AS ti
-                       SET res_id = imd.res_id
+                       SET res_id = imd.res_id,
+                           noupdate = imd.noupdate
                        FROM ir_model_data AS imd
                        WHERE ti.res_id IS NULL
                        AND ti.module IS NOT NULL AND ti.imd_name IS NOT NULL
@@ -150,7 +152,10 @@ class IrTranslationImport(object):
                                src = ti.src,
                                state = 'translated'
                            FROM %s AS ti
-                           WHERE %s AND ti.value IS NOT NULL AND ti.value != ''
+                           WHERE %s
+                           AND ti.value IS NOT NULL
+                           AND ti.value != ''
+                           AND noupdate IS NOT TRUE
                        """ % (self._model_table, self._table, find_expr),
                        (tuple(src_relevant_fields), tuple(src_relevant_fields)))