Add choice fields for business criticality, platform, lifecycle, and origin

[Maffooch]

Introduce choice fields in the ProductSerializer and update the ApiProductFilter to use MultipleChoiceFilter for business criticality, platform, lifecycle, and origin. This enhancement improves data handling and filtering capabilities for these attributes.

Swagger Filters:

Swagger Chema defintion:

Invalid selection error:

$: curl -k  -X 'GET' \
  'https://localhost/api/v2/products/?business_criticality=very%20important' \
  -H 'accept: application/json' \
  -H 'Authorization: Token XXX' | jq .
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   263  100   263    0     0   3334      0 --:--:-- --:--:-- --:--:--  3371
{
  "business_criticality": [
    "Select a valid choice. very important is not one of the available choices."
  ],
  "message": "{'business_criticality': [ErrorDetail(string='Select a valid choice. very important is not one of the available choices.', code='invalid_choice')]}"
}

[valentijnscholten]

Marking this as draft until it's ready ;-)

[mtesauro]

Approved