The server endpoint for policies now returns data streams and
filters out backing indices from the indices array it returned
previously

…icely separated

Given the contraints on working with data streams and indices in policies
at the moment the simplest implementation is to just include data streams
with indices and have the user select them there for now.

The way snapshotting behaviour is currently implemented relies entirely
on what is specified inside of "indices", this is also where data
streams must be placed. This unfortunately means that capture patterns
defined in indices will capture entire data streams too.

…ata-streams

* 'master' of github.com:elastic/kibana: (50 commits)
  [Logs UI] [Alerting] "Group by" functionality (elastic#68250)
  [Discover] Deangularize Skip to bottom button (elastic#69811)
  Implement recursive plugin discovery (elastic#68811)
  Use ts-expect-error in platform code (elastic#69883)
  [SIEM][Detection Engine][Lists] Moves getQueryFilter to common folder for use by both front and backend
  [Ingest Manager][SECURITY SOLUTION] adjust config reassign link and add roundtrip to Reassignment flow (elastic#70208)
  [Security][Lists] Add API functions and react hooks for value list APIs (elastic#69603)
  [ILM] Fix bug when clearing priority field (elastic#70154)
  [Platform][Security] Updates cluster_manager ignorePaths to include security scripts (elastic#70139)
  [IngestManager] Allow to filter agent by packages (elastic#69731)
  [code coverage] exclude folders: test_helpers, tests_bundle (elastic#70199)
  [Metrics UI] UX improvements for saved views (elastic#69910)
  [APM] docs: unique transaction troubleshooting (elastic#69831)
  Cross cluster search functional test with minimun privileges assigned to the test_user (elastic#70007)
  [Maps] choropleth layer wizard (elastic#69699)
  Make custom errors by extending Error (elastic#69966)
  [Ingest Manager] Support updated package output structure (elastic#69864)
  Resolver test coverage (elastic#70246)
  Async Discover search test (elastic#64388)
  [ui-shared-deps] include styled-components (elastic#69322)
  ...

# Conflicts:
#	x-pack/plugins/snapshot_restore/server/types.ts

…policy forms

- added spacer between title and data streams callout
- added copy to the restore settings tab to indicate that settings
  also apply to backing indices

…very in snaphots