elasticsearch: Disable date_detection in origin mapping
So that if the first document with a given field has a date-like value in that field, Elasticsearch does not enforce that all documents and queries on that field use a data.
Also, in the same test checking this, add a similar check for numeric values, in case 'numeric_detection' ever gets turned on by default.
Migrated from D5106 (view on Phabricator)