TUN-10557: Bump quic-go v0.59.1

Bumps quic-go to v0.59.1 (chungthuang fork rebased from upstream v0.45 onto
v0.59.1). Upstream removed the `logging` package and replaced its
callback-based ConnectionTracer with the structured `qlog`/`qlogwriter` event
API, which required migrating cloudflared's QUIC metrics collection.

Migrations:

- quic/tracing.go: connTracer no longer fills a logging.ConnectionTracer
  callback struct. It implements qlogwriter.Trace + qlogwriter.Recorder and
  dispatches qlog events (PacketSent, PacketReceived, MetricsUpdated, ...) to
  the collector through RecordEvent. NewClientTracer now returns a function
  compatible with quic.Config.Tracer.

- quic/metrics.go: collector methods take qlog types (qlog.Frame,
  qlog.PacketType, qlog.MetricsUpdated, ...) and plain int64 in place of the
  removed logging.ByteCount/Frame/RTTStats/TransportParameters.

- quic/conversion.go: PacketType, PacketDropReason and PacketLossReason are
  strings upstream rather than numeric iotas, so the converters become
  pass-through allowlists. CongestionState is also a string;
  congestionStateToFloat maps it back to the numeric gauge values cloudflared
  exports.

- quic.Connection/quic.Stream became *quic.Conn/*quic.Stream; updated
  ConnWithCloser, SafeStreamCloser and the connection package accordingly.
  Tests and generated mocks (mocks/mock_quic_connection.go) were adapted to
  the new pointer-based API.

Closes TUN-10557

vendor/golang.org/x/tools/internal/gocommand/version.go

@@ -1,74 +0,0 @@
-// Copyright 2020 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package gocommand
-
-import (
-	"context"
-	"fmt"
-	"regexp"
-	"strings"
-)
-
-// GoVersion reports the minor version number of the highest release
-// tag built into the go command on the PATH.
-//
-// Note that this may be higher than the version of the go tool used
-// to build this application, and thus the versions of the standard
-// go/{scanner,parser,ast,types} packages that are linked into it.
-// In that case, callers should either downgrade to the version of
-// go used to build the application, or report an error that the
-// application is too old to use the go command on the PATH.
-func GoVersion(ctx context.Context, inv Invocation, r *Runner) (int, error) {
-	inv.Verb = "list"
-	inv.Args = []string{"-e", "-f", `{{context.ReleaseTags}}`, `--`, `unsafe`}
-	inv.BuildFlags = nil // This is not a build command.
-	inv.ModFlag = ""
-	inv.ModFile = ""
-	// Set GO111MODULE=off so that we are immune to errors in go.{work,mod}.
-	// Unfortunately, this breaks the Go 1.21+ toolchain directive and
-	// may affect the set of ReleaseTags; see #68495.
-	inv.Env = append(inv.Env[:len(inv.Env):len(inv.Env)], "GO111MODULE=off")
-
-	stdoutBytes, err := r.Run(ctx, inv)
-	if err != nil {
-		return 0, err
-	}
-	stdout := stdoutBytes.String()
-	if len(stdout) < 3 {
-		return 0, fmt.Errorf("bad ReleaseTags output: %q", stdout)
-	}
-	// Split up "[go1.1 go1.15]" and return highest go1.X value.
-	tags := strings.Fields(stdout[1 : len(stdout)-2])
-	for i := len(tags) - 1; i >= 0; i-- {
-		var version int
-		if _, err := fmt.Sscanf(tags[i], "go1.%d", &version); err != nil {
-			continue
-		}
-		return version, nil
-	}
-	return 0, fmt.Errorf("no parseable ReleaseTags in %v", tags)
-}
-
-// GoVersionOutput returns the complete output of the go version command.
-func GoVersionOutput(ctx context.Context, inv Invocation, r *Runner) (string, error) {
-	inv.Verb = "version"
-	goVersion, err := r.Run(ctx, inv)
-	if err != nil {
-		return "", err
-	}
-	return goVersion.String(), nil
-}
-
-// ParseGoVersionOutput extracts the Go version string
-// from the output of the "go version" command.
-// Given an unrecognized form, it returns an empty string.
-func ParseGoVersionOutput(data string) string {
-	re := regexp.MustCompile(`^go version (go\S+|devel \S+)`)
-	m := re.FindStringSubmatch(data)
-	if len(m) != 2 {
-		return "" // unrecognized version
-	}
-	return m[1]
-}