Add alternative message for reserved keyword and update invalid_criterion error definition

[gmourier]

Summary Key Points

• Add an alternative message for invalid_sort and invalid_filter errors to handle reserved keywords.
• invalid_criterion is renamed to invalid_ranking_rule and add an alternative message to handle reserved keywords.
• Update invalid_geo_field error message.

Pinging @guimachiavelli for information sharing.

[irevoire]

Following our discussion this is the new error message when the indexing part fails on a bad geo field:

{
    "message": "the document with the id: :docid contains an invalid _geo field: :geo_field.",
    "code": "invalid_geo_field",
    "type": "invalid_request",
    "link": "https://docs.meilisearch.com/errors#invalid_geo_field"
}