TUN-4961: Update quic-go to latest

- Updates fips-go to be the latest on cfsetup.yaml
- Updates sumtype's x/tools to be latest to avoid Internal: nil pkg
  errors with fips.

vendor/github.com/lucas-clemente/quic-go/internal/congestion/cubic_sender.go

@@ -1,6 +1,7 @@
 package congestion
 
 import (
+	"fmt"
 	"time"
 
 	"github.com/lucas-clemente/quic-go/internal/protocol"
@@ -14,9 +15,8 @@ const (
 	initialMaxDatagramSize     = protocol.ByteCount(protocol.InitialPacketSizeIPv4)
 	maxBurstPackets            = 3
 	renoBeta                   = 0.7 // Reno backoff factor.
-	initialMaxCongestionWindow = protocol.MaxCongestionWindowPackets * initialMaxDatagramSize
 	minCongestionWindowPackets = 2
-	initialCongestionWindow    = 32 * initialMaxDatagramSize
+	initialCongestionWindow    = 32
 )
 
 type cubicSender struct {
@@ -65,11 +65,33 @@ var (
 )
 
 // NewCubicSender makes a new cubic sender
-func NewCubicSender(clock Clock, rttStats *utils.RTTStats, reno bool, tracer logging.ConnectionTracer) *cubicSender {
-	return newCubicSender(clock, rttStats, reno, initialCongestionWindow, initialMaxCongestionWindow, tracer)
+func NewCubicSender(
+	clock Clock,
+	rttStats *utils.RTTStats,
+	initialMaxDatagramSize protocol.ByteCount,
+	reno bool,
+	tracer logging.ConnectionTracer,
+) *cubicSender {
+	return newCubicSender(
+		clock,
+		rttStats,
+		reno,
+		initialMaxDatagramSize,
+		initialCongestionWindow*initialMaxDatagramSize,
+		protocol.MaxCongestionWindowPackets*initialMaxDatagramSize,
+		tracer,
+	)
 }
 
-func newCubicSender(clock Clock, rttStats *utils.RTTStats, reno bool, initialCongestionWindow, initialMaxCongestionWindow protocol.ByteCount, tracer logging.ConnectionTracer) *cubicSender {
+func newCubicSender(
+	clock Clock,
+	rttStats *utils.RTTStats,
+	reno bool,
+	initialMaxDatagramSize,
+	initialCongestionWindow,
+	initialMaxCongestionWindow protocol.ByteCount,
+	tracer logging.ConnectionTracer,
+) *cubicSender {
 	c := &cubicSender{
 		rttStats:                   rttStats,
 		largestSentPacketNumber:    protocol.InvalidPacketNumber,
@@ -283,7 +305,7 @@ func (c *cubicSender) maybeTraceStateChange(new logging.CongestionState) {
 
 func (c *cubicSender) SetMaxDatagramSize(s protocol.ByteCount) {
 	if s < c.maxDatagramSize {
-		panic("congestion BUG: decreased max datagram size")
+		panic(fmt.Sprintf("congestion BUG: decreased max datagram size from %d to %d", c.maxDatagramSize, s))
 	}
 	cwndIsMinCwnd := c.congestionWindow == c.minCongestionWindow()
 	c.maxDatagramSize = s