James Rodewig 726c35dfd0 [DOCS] Add identifier mapping tip to numeric and keyword datatype docs (#49933)
Users often mistakenly map numeric IDs to numeric datatypes. However,
this is often slow for the `term` and other term-level queries.

The "Tune for search speed" docs includes advice for mapping numeric
IDs to `keyword` fields. However, this tip is not included in the
`numeric` or `keyword` field datatype doc pages.

This rewords the tip in the "Tune for search speed" docs, relocates it
to the `numeric` field docs, and reuses it using tagged regions.
2019-12-17 09:34:32 -05:00
..