Prometheus: Implement Streaming JSON Parser (#48477)

use `prometheusStreamingJSONParser` feature toggle to enable

pkg/services/featuremgmt/registry.go

@@ -254,5 +254,10 @@ var (
 			State:        FeatureStateAlpha,
 			FrontendOnly: true,
 		},
+		{
+			Name:        "prometheusStreamingJSONParser",
+			Description: "Enable streaming JSON parser for Prometheus datasource",
+			State:       FeatureStateAlpha,
+		},
 	}
 )

pkg/services/featuremgmt/toggles_gen.go

@@ -186,4 +186,8 @@ const (
 	// FlagTraceToMetrics
 	// Enable trace to metrics links
 	FlagTraceToMetrics = "traceToMetrics"
+
+	// FlagPrometheusStreamingJSONParser
+	// Enable streaming JSON parser for Prometheus datasource
+	FlagPrometheusStreamingJSONParser = "prometheusStreamingJSONParser"
 )