[Security Solution] OpenAPI docs bundler (elastic#171526)

**Addresses:** elastic/security-team#7981

## Summary

This PR adds an OpenAPI spec bundler to simplify integration with the
Docs Engineering team. The bundler produces a single bundled file by
dereferencing and inlining some of external references and bundling them
and paths into a single file.

## Details

Currently we maintain a number of schema files inside
`x-pack/plugins/security_solution/common/api/**.schema.yaml` and it
might be hard for external teams to keep track of all the changes in our
schemas. By creating a singular schema file, we provide a clear
integration point for others.

The bundler addresses the following issues

- hide endpoints that we don't want to expose (Endpoints related to
features hidden under a feature flag and all internal endpoints should
be excluded from the file)
- hide not finished data structures related to features hidden under a
feature flag or data structures that are not designed to be public (For
example `RuleActionAlertsFilter` or `RuleActionParams` are exposed
directly from the Alerting framework and might be considered
implementation details, we don't want to document interfaces that are
not designed to be public so hiding them is a good option)
- modify spec based on presence of `x-modify` property (Instead of
exposing `x-modify: partial` we need to make the exported data structure
partial and instead of exposing `x-modify: required` we need to make the
exported data structure required)
- remove any internal attributes used for code generation like
`x-codegen-enabled` and `x-modify`
- inline some of the reused data structures (We have a lot of low-level
reusable data structures `in common_attributes.schema.yaml` which might
make the final documentation hardly usable from the UX perspective, so
we can inline them)

and lives in a new `@kbn/openapi-bundler` package under
`packages/kbn-openapi-bundler` folder.

### Related changes

- Implicit version type `version: 2023-10-31` has been changed to
explicit string type `version: '2023-10-31'` for all specs under
`security_solution/common/api` folder. Implicit type causes `js-yaml`
parsing it as a `Data` JS object leading to serializing it like
`2023-10-31T00:00:00.000Z`.
- `ListRequestQuery` schema in
`security_solution/common/api/endpoint/actions/list.schema.yaml ` has
been renamed to `EndpointActionListRequestQuery` to avoid conflicts with
`ListRequestQuery` in
`security_solution/common/api/endpoint/metadata/list_metadata.schema.yaml`.
While it's not an issue to have completely different schemas sharing the
same name in different files it may be an indication of pitfalls in the
API design. I'd say it's an open question if such cases need to be
always resolved automatically or reviewed manually. At this moment the
bundler can't resolve such conflicts.

## How to test?

There is a a new JS script added to Security Solution plugin located at
`x-pack/plugins/security_solution/scripts/openapi/bundle.js` with a
corresponding entry in `package.json` named `openapi:bundle`.

To test the PR change directory to Security Solution plugin's root
folder and run the bundler like below

```sh
cd x-pack/plugins/security_solution
yarn openapi:bundle
```

It should produce a bundled OpenAPI spec at
`x-pack/plugins/security_solution/target/openapi/security_solution.bundled.schema.yaml`.

## Open issues

- [x] Circular references (implemented in
elastic@dfdf0a5)
- [x] Mix of OpenAPI `3.0` and `3.1` specs (Maybe convert automatically
to `3.1`?). Folder like OpenAPI bundling format implemented
[here](elastic@0ae7ad5)
allows to mix OpenAPI `3.0` and `3.1` specs.

## Improvements

- [ ] Flexible configuration
- [ ] CLI support?

---------

Co-authored-by: kibanamachine <[email protected]>

.github/CODEOWNERS

@@ -559,6 +559,7 @@ x-pack/plugins/observability @elastic/obs-ux-management-team
 x-pack/plugins/observability_shared @elastic/observability-ui
 x-pack/test/security_api_integration/plugins/oidc_provider @elastic/kibana-security
 test/common/plugins/otel_metrics @elastic/obs-ux-infra_services-team
+packages/kbn-openapi-bundler @elastic/security-detection-rule-management
 packages/kbn-openapi-generator @elastic/security-detection-rule-management
 packages/kbn-optimizer @elastic/kibana-operations
 packages/kbn-optimizer-webpack-helpers @elastic/kibana-operations

package.json

@@ -1244,6 +1244,7 @@
     "@kbn/managed-vscode-config-cli": "link:packages/kbn-managed-vscode-config-cli",
     "@kbn/management-storybook-config": "link:packages/kbn-management/storybook/config",
     "@kbn/mock-idp-plugin": "link:packages/kbn-mock-idp-plugin",
+    "@kbn/openapi-bundler": "link:packages/kbn-openapi-bundler",
     "@kbn/openapi-generator": "link:packages/kbn-openapi-generator",
     "@kbn/optimizer": "link:packages/kbn-optimizer",
     "@kbn/optimizer-webpack-helpers": "link:packages/kbn-optimizer-webpack-helpers",