Fetch subs and accounts via MS graph (#1677)

* fetch subs and accounts via graph

* fixed subscription rendering

* add feature flag enableResourceGraph

* add feature flag enableResourceGraph

---------

Co-authored-by: Asier Isayas <aisayas@microsoft.com>

src/Contracts/AzureResourceGraph.ts

@@ -0,0 +1,13 @@
+export interface QueryRequestOptions {
+  $skipToken?: string;
+  $top?: number;
+  subscriptions: string[];
+}
+
+export interface QueryResponse {
+  $skipToken: string;
+  count: number;
+  data: any;
+  resultTruncated: boolean;
+  totalRecords: number;
+}