[Variant tags] Ability to add several tags to a variant and filter the product list

[RachL]

⚠️ Please use clockify code #XXXX Network 2.0

Context

This is the first step towards adding tags to variants (ie tags which work with our tag rules). Here we want to give the ability for producers / hubs to add tags to variants in order to filter the product list.

Description

- As a: enterprise user or super admin
- On page: /admin/products
- I want to be able to do:

On the product list, I can see a new column called tags. It should be visible by default. I can create a tag by typing and pressing enter (like on the customer page) I can add as many tags as needed.

On the top bar, becomes then available in the dropdown, as filters.

Currently the dropdown for tags, allows to see how many tag rules are linked. Making tags work with existing tag rules is going to be in another issue, but we need to think about this when choosing the type of dropdown we want to introduce here (I'm assuming we could take the opportunity to uplift this dropdown => white text when tag is selected, more rounding shapes....)

Acceptance Criteria & Tests

TODO