[MIG] sql_request_abstract: Migration to 17.0

sql_request_abstract/readme/DESCRIPTION.md

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+This module provides an abstract model to manage SQL Select requests on
+database. It is not usefull for itself. You can see an exemple of
+implementation in the 'sql_export' module. (same repository).
+
+## Implemented features
+
+- Add some restrictions in the sql request:  
+  - you can only read datas. No update, deletion or creation are
+    possible.
+  - some tables are not allowed, because they could contains clear
+    password or keys. For the time being ('ir_config_parameter').
+
+- The request can be in a 'draft' or a 'SQL Valid' status. To be valid,
+  the request has to be cleaned, checked and tested. All of this
+  operations can be disabled in the inherited modules.
+
+- This module two new groups:  
+  - SQL Request / User : Can see all the sql requests by default and
+    execute them, if they are valid.
+  - SQL Request / Manager : has full access on sql requests.