SSE/Alerting: First pass at query/condition translation (#31693)

- Takes the conditions property from the settings column of an alert from alerts table and turns into an ng alerting condition with the queries and classic condition.
- Has temp API rest endpoint that will take the dashboard conditions json, translate it to SEE queries + classic condition, and execute it (only enabled in dev mode).
- Changes expressions to catch query responses with a non-nil error property
- Adds two new states for an NG instance result (NoData, Error) and updates evaluation to match those states
- Changes the AsDataFrame (for frontend) from Bool to string to represent additional states
- Fix bug in condition model to accept first Operator as empty string.
- In ngalert, adds GetQueryDataRequest, which was part of execute and is still called from there. But this allows me to get the Expression request from a condition to make the "pipeline" can be built.
- Update AsDataFrame for evalresult to be row based so it displays a little better for now

pkg/expr/translate/testdata/sameQueryDifferentTimeRange.json

@@ -0,0 +1,63 @@
+{ 
+	"conditions": [
+	{
+	  "evaluator": {
+		"params": [
+		  0
+		],
+		"type": "lt"
+	  },
+	  "operator": {
+		"type": ""
+	  },
+	  "query": {
+		"datasourceId": 2,
+		"model": {
+		  "expr": "avg_over_time(sum by (instance) (up)[1h:5m])",
+		  "interval": "",
+		  "legendFormat": "",
+		  "refId": "A"
+		},
+		"params": [
+		  "A",
+		  "5m",
+		  "now"
+		]
+	  },
+	  "reducer": {
+		"params": [],
+		"type": "avg"
+	  },
+	  "type": "query"
+	},
+	{
+	  "evaluator": {
+		"params": [
+		  0
+		],
+		"type": "gt"
+	  },
+	  "operator": {
+		"type": "and"
+	  },
+	  "query": {
+		"datasourceId": 2,
+		"model": {
+		  "expr": "avg_over_time(sum by (instance) (up)[1h:5m])",
+		  "interval": "",
+		  "legendFormat": "",
+		  "refId": "A"
+		},
+		"params": [
+		  "A",
+		  "10m",
+		  "now-5m"
+		]
+	  },
+	  "reducer": {
+		"params": [],
+		"type": "avg"
+	  },
+	  "type": "query"
+	}
+  ]}