Add the IBAN and the mandate reference on the contribution list page

[jaapjansma]

Fixes #801.

Background

At one of our clients we had an issue where the generated contributions ended up with all the same recurring contribution .

This was not visible in the user interface and only visible the bank file. As each transaction was deducted from the same bank account. (So there was one donor who paid for all donors)

One of the things which would likely prevented this is when the IBAN and the mandate reference would have been visible in the UI.

Before

When clicking on Contributions next to a SEPA group no info was given on the mandate.

After

The mandate reference and the IBAN are visible.

[jaapjansma]

The PHP Stan checks are failing but I am not sure why and what can be done about it.

[jensschuppe]

Noting that this depends on #803 as otherwise the batching query will return different results.

The tests not failing is actually a sign we should add more tests …

[jaapjansma]

@jensschuppe the php unit is failing on the function data_processor_postInstall howver in the dataprocessor.php file that function is removed a while ago, see: https://lab.civicrm.org/extensions/dataprocessor/-/commit/eef9cd6b91a811edcbff9866e4a95e46ab93ff93?file_path=dataprocessor.civix.php#line_f717dbb74_126

Since then there are two new versions released of the data processor extension. And it seems that the phpunit here is running an old version.

[jaapjansma]

@jensschuppe ah now all checks have passed!

[jensschuppe]

Needs rebase once #804 is merged (and probably a refactoring given that this currently contains a workaround for the join issue fixed with switching to EFv2).