RBAC: Optimize permissions caching (#92673)

* Access control: Use composite cache key for team permissions

* use composite key for teams

* use cache for hotpath (getCachedUserPermissions)

* don't cache empty teams set

* don't pass permissions as argument

* early return if no teams found

* reload cache correctly

* optimize allocations

* Clear user's teams cache

* remove composite cache for teams

* fix linter

* don't clear teams permissions

* pre-allocate memory for basic roles permissions

pkg/services/accesscontrol/cacheutils_test.go

@@ -6,6 +6,7 @@ import (
 	"github.com/stretchr/testify/assert"
 
 	"github.com/grafana/authlib/claims"
+
 	"github.com/grafana/grafana/pkg/services/org"
 	"github.com/grafana/grafana/pkg/services/user"
 )
@@ -68,7 +69,7 @@ func TestPermissionCacheKey(t *testing.T) {
 
 	for _, tc := range testcases {
 		t.Run(tc.name, func(t *testing.T) {
-			assert.Equal(t, tc.expected, GetPermissionCacheKey(tc.signedInUser))
+			assert.Equal(t, tc.expected, GetUserPermissionCacheKey(tc.signedInUser))
 		})
 	}
 }