V801-024 Add exception handlers and logs to the refactoring tools

[joaopsazevedo]

See this commit in laltools: https://github.com/AdaCore/libadalang-tools/commit/68ffb694053abefd74d123dee250450d576a6aa7 If any exception is raised by Is__Available, it is now logged and False is returned. If any exception is raised by .Refactor, it is now logged and No_Refactoring_Edits is returned. To enable the logs, add LALTOOLS.REFACTOR=yes to the ALS traces.

This patches:

• refactors the ALS part according to the changes in laltools
• adds an extra exception handler when executing the refactoring code actions
• Improves the failed request message shown to the user