Kibana version: master (latest snapshot build)

Elasticsearch version: master (latest snapshot build)

Server OS version: CentOS 7

Browser version: Chrome 85

Browser OS version: Windows 10

Original install method (e.g. download page, yum, from source, etc.): rpms default dist

Describe the bug: I often create a Kibana index pattern for the .kibana index to make it easier to look at saved object data. When I did that on the lastest master snapshot I got an error dialog in Kibana which says;

  Unknown field type
  action.secrets

  Field unknown in indexPattern .kibana is
  using an unknown field type.

Steps to reproduce:

1. go to Stack Management > Kibana > Index Patterns
2. click Create index pattern
3. toggle Include system and hidden indices on
4. enter .kibana
5. click Next step >
6. select I don't want to use the time filter
7. click Create index pattern and be ready to capture the error (it doesn't stick around very long)

Expected behavior: Creating this index pattern shouldn't cause an error.

Screenshots (if relevant):

Errors in browser console (if relevant):
I see a 404 on this;
GET https://localhost:5601/internal/index-pattern-management/resolve_index

Provide logs and/or server output (if relevant):

Any additional context: