[v11.0.x] Expressions+Testdata: Create json schema for query types (#86164)

Expressions: Create json schema for query types (#84032)

(cherry picked from commit 4cda34ff7d)

Co-authored-by: Ryan McKinley <ryantxu@gmail.com>

pkg/tsdb/grafana-testdata-datasource/kinds/query.request.example.json

@@ -0,0 +1,25 @@
+{
+  "from": "now-1h",
+  "to": "now",
+  "queries": [
+    {
+      "refId": "A",
+      "maxDataPoints": 1000,
+      "intervalMs": 5,
+      "scenarioId": "random_walk"
+    },
+    {
+      "refId": "B",
+      "maxDataPoints": 1000,
+      "intervalMs": 5,
+      "pulseWave": {
+        "offCount": 20,
+        "offValue": 1.23,
+        "onCount": 10,
+        "onValue": 4.56,
+        "timeStep": 1000
+      },
+      "scenarioId": "predictable_pulse"
+    }
+  ]
+}