Content bank, and Backpack generators don't make sense

```
And the following "contentbank contents" exist:
And the following "badge external backpacks" exist:
And the following "setup backpacks connected" exist:
```

None of these are grammatically correct. Ideally they would also be in the component to which they belong. For example:

• contentbank contents belongs in contentbank/tests/behat/behat_core_contentbank_generator.php, named as "items" and used as "core_contentbank > items";
• badge external backpacks belongs in badges/tests/behat/behat_core_badges_generator.php, named as "external backpacks" and used as "core_badges > external backpacks";
• setup backpacks connected belongs in badges/tests/behat/behat_core_badges_generator.php, named as "configured backpacks" and used as "core_badges > configured backpacks".

Unfortunately we currently do not have a way to deprecate the old uses.