* introduce state to the REST API specification
* change state over to stability
* CCR is no GA updated to stable
* SQL is now GA so marked as stable
* Introduce `internal` as state for API's, marks stable in terms of lifetime but unstable in terms of guarantees on its output format since it exposes internal representations
* make setting a wrong stability value, or not setting it at all an error that causes the YAML test suite to fail
* update spec files to be explicit about their stability state
* Document the fact that stability needs to be defined
Otherwise the YAML test runner will fail (with a nice exception message)
* address check style violations
* update rest spec unit tests to include stability
* found one more test spec file not declaring stability, made sure stability appears after documentation everywhere
* cluster.state is stable, mark response in some way to denote its a key value format that can be changed during minors
* mark data frame API's as beta
* remove internal and private as states for an API
* removed the wrong enum values in the Stability Enum in the previous commit
(cherry picked from commit 61c34bbd92f8f7e5f22fa411c6b682b0ebd8a99d)
* Documents the new deprecations options on the rest-api-spec
Relates #41439#38613#35262
* remove reference to path now that #41452 is merged, also fixed missing a comma rendering the example json invalid
* removed one more instance of path
* make sure json examples are self contained and not excerpts
(cherry picked from commit 4430f99750a3bf98373d69d2be59d71475c7aaad)
Martijn Laarman
Isabel Drost-Fromm
Honza Král
Chris Mattmann
Clinton Gormley
Karel Minarik