* [data.search] Add search session methods to search service contract

* Fix types

* Fix tests and switch to cancel

* Update docs

* Fix types/tests

* Fix tests

* Update status of SO before cancelling search requests

* Add API integration test

* Fix types

* Update expiration route to use config defaultExpiration

* Fix test

* Update docs

* New logic for extend

* Remove declare module

* Search Sessions: Unskip Flaky Functional Test

* Review feedback

* fix ts

* Save all search sessions and then manage them based on their persisted state

* Get default search session expiration from config

* randomize sleep time

* fix test

* Remove test that is no longer valid

* fix test

* Make sure we poll, and dont persist, searches not in the context of a session

* Added keepalive unit tests

* fix ts

* code review @lukasolson

* ts

* More tests, rename onScreenTimeout to completedTimeout

* lint

* lint

* Delete async seaches

* Support saved object pagination
Fix get search status tests

* better PersistedSearchSessionSavedObjectAttributes ts

* test titles

* Fix undefined bug

* Remove runAt from monitoring task
Increase testing trackingInterval (caused bug)

* support workload histograms that take into account overdue tasks

* Update touched when changing session status to complete \ error

* removed test

* Updated management test data

* Rename configs

* delete tap first
add comments

* Use DataRequestHandlerContext in maps

* ts

* Fixed ts

Co-authored-by: Lukas Olson <olson.lukas@gmail.com>
Co-authored-by: Timothy Sullivan <tsullivan@elastic.co>
Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>
Co-authored-by: Anton Dosov <anton.dosov@elastic.co>
Co-authored-by: Gidi Meir Morris <github@gidi.io>