Plugins: Add username to datasource plugin logging (#59893)

Co-authored-by: Marcus Efraimsson <marcus.efraimsson@gmail.com>
Signed-off-by: bergquist <carl.bergquist@gmail.com>

pkg/infra/log/requestTiming.go

@@ -0,0 +1,28 @@
+package log
+
+import (
+	"context"
+	"time"
+)
+
+type requestStartTimeContextKey struct{}
+
+var requestStartTime = requestStartTimeContextKey{}
+
+// InitCounter creates a pointer on the context that can be incremented later
+func InitstartTime(ctx context.Context, now time.Time) context.Context {
+	return context.WithValue(ctx, requestStartTime, now)
+}
+
+// TimeSinceStart returns time spend since the request started in grafana
+func TimeSinceStart(ctx context.Context, now time.Time) time.Duration {
+	val := ctx.Value(requestStartTime)
+	if val != nil {
+		startTime, ok := val.(time.Time)
+		if ok {
+			return now.Sub(startTime)
+		}
+	}
+
+	return 0
+}