PURPOSE
Have a cleaner test_mail addons
SPECIFICATIONS
Keep only mail-related tests, move odoobot in test mail full, send "update
notification" tests in mail (specific to mail). Merge some test files to
lessen number of files, perform light file renaming.
Split test mail models file to prepare some cleaning in those models and tests.
LINKS
Prepares Task ID 2238597 (clean notification models)
Prepares Task ID 2083854 (improve mass mailing technical flows)
PR #49891
Test performance will now hold the base class for performance tests as
well as tests related to the ORM, depending only on base. A new module
test_mail is introduced at this commit that contains performance tests
related to mail module. This commit contains only code move and should
not impact anything.
Future commits will move mail tests into test_mail so that all mail
related tests are located in the same optional module. This allows
notably to avoid creating a lot of unnecessary tables when installing
mail module on production databases.