Replace address picker with vue component

Preparation for #1565

What does this MR do?

Replaces every usage of the old address picker with the LeafletLocationSearch component: in the event form, the food-share point form, and the foodsaver form.

How confident are you it won't break things if deployed?

Quite sure, I tested all three cases. The vue component has already been in use and should work fine.

Links to related issues

How to test

1. Checkout branch locally
2. Login as foodsaver
3. Go to the events page of any region and create a new event
4. In the form, select a location on the map
5. Save and check that the event's location was save correctly
6. Test the same thing for foodsaver address (in the settings) and when creating a new food-share point

Screenshots (if applicable)

Checklist

• added a test, or explain why one is not needed/possible...
• no unrelated changes
• asked someone for a code review
• set a "for:" label to indicate who will be affected by this change
• added to the next milestone (see https://gitlab.com/foodsharing-dev/foodsharing/-/milestones, unless it has a "for:Dev" label)
• added an entry to CHANGELOG.md
• added a short text in the release notes to /release-notes/YYYY-MM.md
• Once your MR has been merged, you are responsible to create a testing issue in the Beta Testing forum: https://foodsharing.de/region?bid=734&sub=forum. Please change the MRs label to "state:Beta testing".
  • Consider writing a detailed description in German.
  • Describe in a few sentences, what should be tested from a user perspective.
  • Also mention different settings (e.g. different browsers, roles, ...) how this change can be tested.
  • Be aware, that also non technical people should understand.