Actionsets: Add ability for plugins to add actions for core actionsets (i.e. folders:edit) (#88776)

* initial commit

* Action sets stored
remove the dependancy for actionsets
got the actionsets registered
storing the permissions

* fix golanglinting

* remove unused struct field

* wip

* actionset registry for a plugin from the actionsetservice

* update to make declareactionset the primary way of plugin registration and modification

* declare actually extends actionsets

* tests fixed

* tests skipped

* skip tests

* skip tests

* skip tests

* skip tests

* change to warning instead

* remove step from pipeline to see if it fails due to plugin not registering

* reintroduce step but remove features dependancy

* add back the tests that were failing

* remove comments and another skip test

* fix a comment and remove unneeded changes

* fix and clean up, put the behaviour behind a feature toggle

* clean up

* fixing tests

* hard-code allowed action sets for plugins

* Apply suggestions from code review

Co-authored-by: Gabriel MABILLE <gamab@users.noreply.github.com>

* small cleanup

---------

Co-authored-by: IevaVasiljeva <ieva.vasiljeva@grafana.com>
Co-authored-by: Gabriel MABILLE <gamab@users.noreply.github.com>

pkg/plugins/plugins.go

@@ -101,7 +101,8 @@ type JSONData struct {
 	Routes       []*Route     `json:"routes"`
 
 	// AccessControl settings
-	Roles []RoleRegistration `json:"roles,omitempty"`
+	Roles      []RoleRegistration `json:"roles,omitempty"`
+	ActionSets []ActionSet        `json:"actionSets,omitempty"`
 
 	// Panel settings
 	SkipDataQuery bool `json:"skipDataQuery"`