grafana-iam: Implement resourcepermission list (#110769)

* WIP: List

* make toV0ResourcePermissions work with an ordered list of assignments to ensure consistency in the results

* Test templates

* Split list query in two. I clearly need scopePatterns

* Add pagination with offsets

* Remove unecessary comment

* implement listiterator

* add listiterator tests

* return the correct resource version

* use SkipIntegrationTestInShortMode

* No need for the extra check on pagination being correctly set

Co-authored-by: Ieva <ieva.vasiljeva@grafana.com>

* Spec is out of date

* Remove wrong comment

* Add a test for the pagination token

---------

Co-authored-by: mohammad-hamid <mohammad.hamid@grafana.com>
Co-authored-by: Ieva <ieva.vasiljeva@grafana.com>

pkg/registry/apis/iam/resourcepermission/queries/page_query.sql

@@ -0,0 +1,10 @@
+SELECT p.scope
+FROM {{ .Ident .PermissionTable }} AS p
+INNER JOIN {{ .Ident .RoleTable }} AS r ON p.role_id = r.id
+WHERE r.name LIKE {{ .Arg .ManagedRolePattern }} 
+    AND r.org_id = {{ .Arg .Query.OrgID }}
+    AND ( {{ range $index, $scopePattern := .Query.ScopePatterns }}{{ if $index }} OR {{ end }} p.scope LIKE {{ $.Arg $scopePattern }}{{ end }} )
+GROUP BY p.scope
+ORDER BY p.scope
+LIMIT {{ .Arg .Query.Pagination.Limit }}
+OFFSET {{ .Arg .Query.Pagination.Continue }}