Temporarily disable bulk Delete for old non-partitioned NoSQL containers (#1880)

* Disable Delete button and document selection when partitionKey.systemKey = true for noSql.

* Update unit tests

* Always show delete button. Use single delete API for systemKey containers

src/Explorer/Tabs/DocumentsTabV2/DocumentsTabV2.test.tsx

@@ -340,7 +340,7 @@ describe("Documents tab (noSql API)", () => {
       isPreferredApiMongoDB: false,
       documentIds: [],
       collection: undefined,
-      partitionKey: undefined,
+      partitionKey: { kind: "Hash", paths: ["/foo"], version: 2 },
       onLoadStartKey: 0,
       tabTitle: "",
       onExecutionErrorChange: (isExecutionError: boolean): void => {