Add setting to ignore dynamic fields when field limit is reached (#96235)
Adds a new `index.mapping.total_fields.ignore_dynamic_beyond_limit`
index setting.
When set to `true`, new fields are added to the mapping as long as the
field limit (`index.mapping.total_fields.limit`) is not exceeded. Fields
that would exceed the limit are not added to the mapping, similar to
`dynamic: false`. Ignored fields are added to the `_ignored` metadata
field.
Relates to https://github.com/elastic/elasticsearch/issues/89911
To make this easier to review, this is split into the following PRs: -
[x] https://github.com/elastic/elasticsearch/pull/102915 - [x]
https://github.com/elastic/elasticsearch/pull/102936 - [x]
https://github.com/elastic/elasticsearch/pull/104769
Related but not a prerequisite: - [ ]
https://github.com/elastic/elasticsearch/pull/102885
f642b8a3aa