unify query frontend instant and range protos (#6180)

Signed-off-by: Ben Ye <[email protected]>

Author: yeya24

pkg/querier/tripperware/custom.go

@@ -0,0 +1,35 @@
+package tripperware
+
+import (
+	"fmt"
+
+	"github.com/gogo/protobuf/types"
+)
+
+func (e *Extent) ToResponse() (Response, error) {
+	msg, err := types.EmptyAny(e.Response)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := types.UnmarshalAny(e.Response, msg); err != nil {
+		return nil, err
+	}
+
+	resp, ok := msg.(Response)
+	if !ok {
+		return nil, fmt.Errorf("bad cached type")
+	}
+	return resp, nil
+}
+
+func (m *Sample) GetTimestampMs() int64 {
+	if m != nil {
+		if m.Sample != nil {
+			return m.Sample.TimestampMs
+		} else if m.Histogram != nil {
+			return m.Histogram.TimestampMs
+		}
+	}
+	return 0
+}