Correlations: Add CreateCorrelation HTTP API (#51630)

* Correlations: add migration

* Correlations: Add CreateCorrelation API

* Correlations: Make correlations work with provisioning

* Handle version changes

* Fix lining error

* lint fixes

* rebuild betterer results

* add a UID to each correlation

* Fix lint errors

* add docs

* better wording in API docs

* remove leftover comment

* handle ds updates

* Fix error message typo

* add bad data test

* make correlations a separate table

* skip readonly check when provisioning correlations

* delete stale correlations when datasources are deleted

* restore provisioned readonly ds

* publish deletion event with full data

* generate swagger and HTTP API docs

* apply source datasource permission to create correlation API

* Fix tests & lint errors

* ignore empty deletion events

* fix last lint errors

* fix more lint error

* Only publish deletion event if datasource was actually deleted

* delete DS provisioning deletes correlations, added & fixed tests

* Fix unmarshalling tests

* Fix linting errors

* Fix deltion event tests

* fix small linting error

* fix lint errors

* update betterer

* fix test

* make path singular

* Revert "make path singular"

This reverts commit 420c3d315e.

* add integration tests

* remove unneeded id from correlations table

* update spec

* update leftover references to CorrelationDTO

* fix tests

* cleanup tests

* fix lint error

pkg/api/http_server.go

@@ -65,6 +65,7 @@ import (
 	"github.com/grafana/grafana/pkg/services/provisioning"
 	"github.com/grafana/grafana/pkg/services/quota"
 
+	"github.com/grafana/grafana/pkg/services/correlations"
 	publicdashboardsApi "github.com/grafana/grafana/pkg/services/publicdashboards/api"
 	"github.com/grafana/grafana/pkg/services/query"
 	"github.com/grafana/grafana/pkg/services/queryhistory"
@@ -122,6 +123,7 @@ type HTTPServer struct {
 	SearchService                search.Service
 	ShortURLService              shorturls.Service
 	QueryHistoryService          queryhistory.Service
+	CorrelationsService          correlations.Service
 	Live                         *live.GrafanaLive
 	LivePushGateway              *pushhttp.Gateway
 	ThumbService                 thumbs.Service
@@ -188,7 +190,7 @@ func ProvideHTTPServer(opts ServerOptions, cfg *setting.Cfg, routeRegister routi
 	pluginDashboardService plugindashboards.Service, pluginStore plugins.Store, pluginClient plugins.Client,
 	pluginErrorResolver plugins.ErrorResolver, pluginManager plugins.Manager, settingsProvider setting.Provider,
 	dataSourceCache datasources.CacheService, userTokenService models.UserTokenService,
-	cleanUpService *cleanup.CleanUpService, shortURLService shorturls.Service, queryHistoryService queryhistory.Service,
+	cleanUpService *cleanup.CleanUpService, shortURLService shorturls.Service, queryHistoryService queryhistory.Service, correlationsService correlations.Service,
 	thumbService thumbs.Service, remoteCache *remotecache.RemoteCache, provisioningService provisioning.ProvisioningService,
 	loginService login.Service, authenticator loginpkg.Authenticator, accessControl accesscontrol.AccessControl,
 	dataSourceProxy *datasourceproxy.DataSourceProxyService, searchService *search.SearchService,
@@ -239,6 +241,7 @@ func ProvideHTTPServer(opts ServerOptions, cfg *setting.Cfg, routeRegister routi
 		cleanUpService:               cleanUpService,
 		ShortURLService:              shortURLService,
 		QueryHistoryService:          queryHistoryService,
+		CorrelationsService:          correlationsService,
 		Features:                     features,
 		ThumbService:                 thumbService,
 		StorageService:               storageService,