This commit removes the main MP2 migration class and its test class. It
also removes two SQL files that were used in the test class. One of
those files executed the following query:
`SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO"`
Removing this query made the tests inside SubscriberSegmentTest fail
when running the whole integration test suite. To work around this, I
added the above mentioned query to SubscriberSegmentTest. I'm not sure
why this test class fails without this query when running all the tests
but it doesn't when it is executed alone. Probably there is another test
class changing the SQL_MODE. Since SubscriberSegmentTest is a test class
for a Paris model that we will eventually remove, I decided it was not
necessary to investigate this further.
[MAILPOET-4376]
While removing some deprecated models in the commit
a525b96f16, I noticed that we maintain a
list of tables that needs to be truncated before running the integration
tests. To make it easier when removing future models and to make sure
the list of tables is always updated, in this commit, I'm removing the
manual list and changing the code to dynamically get the tables and
truncate them.
The code that I removed from _bootstrap.php, meant that PHPStan error
was not present anymore, so it was possible to update its baseline files
to remove the ignores for that error.
[MAILPOET-4325]
