fix https://github.com/elastic/kibana/issues/192052
## Summary
Internal APIs will be
[restricted](https://github.com/elastic/kibana/issues/163654) from
public access as of 9.0.0. In non-serverless environments, this breaking
change will result in a 400 error if an external request is made to an
internal Kibana API (route `access` option as `"internal"` or
`"public"`).
This PR allows API owners of non-xpack plugins to run their `ftr` API
integration tests against the restriction and adds examples of how to
handle it.
### Checklist
- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
Note to reviewers: The header needed to allow access to internal apis
shouldn't change your test output, with or without the restriction
enabled.
### How to test the changes work:
#### Non x-pack:
1. Set `server.restrictInternalApis: true` in `test/common/config.js`
2. Ensure your tests pass
#### x-pack:
1. Set `server.restrictInternalApis: true` in
`x-pack/test/api_integration/apis/security/config.ts`
2. Ensure the spaces tests pass
---------
Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
## Summary
Uses the versioned router for the remaining routes in the data plugin:
KQL telemetry (opt-in stats), and scripting languages list.
### Checklist
- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
* [@kbn/expect] "fork" expect.js into repo
* [eslint] autofix references to expect.js
* [tslint] autofix all expect.js imports
* now that expect.js is in strict mode, avoid reassigning fn.length
In order to make the license that applies to each file as clear as possible, and to be consistent with elasticsearch, we are adding Apache 2.0 license headers to the top of each file.
Existence of this header is enforced by eslint and tslint and missing headers were automatically added in the last commit by running:
```
node scripts/eslint --fix && node scripts/tslint --fix
```
