Update to go 1.18.6 to address CVE-2022-27664, CVE-2022-32190

From the mailing list:

We have just released Go versions 1.19.1 and 1.18.6, minor point releases.
These minor releases include 2 security fixes following the security policy:

- net/http: handle server errors after sending GOAWAY
  A closing HTTP/2 server connection could hang forever waiting for a clean
  shutdown that was preempted by a subsequent fatal error. This failure mode
  could be exploited to cause a denial of service.

  Thanks to Bahruz Jabiyev, Tommaso Innocenti, Anthony Gavazzi, Steven Sprecher,
  and Kaan Onarlioglu for reporting this.

  This is CVE-2022-27664 and Go issue https://go.dev/issue/54658.

- net/url: JoinPath does not strip relative path components in all circumstances
  JoinPath and URL.JoinPath would not remove `../` path components appended to a
  relative path. For example, `JoinPath("https://go.dev", "../go")` returned the
  URL `https://go.dev/../go`, despite the JoinPath documentation stating that
  `../` path elements are cleaned from the result.

  Thanks to q0jt for reporting this issue.

  This is CVE-2022-32190 and Go issue https://go.dev/issue/54385.

Release notes:

go1.18.6 (released 2022-09-06) includes security fixes to the net/http package,
as well as bug fixes to the compiler, the go command, the pprof command, the
runtime, and the crypto/tls, encoding/xml, and net packages. See the Go 1.18.6
milestone on the issue tracker for details;

https://github.com/golang/go/issues?q=milestone%3AGo1.18.6+label%3ACherryPickApproved

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit cba36a064dc82ba49d5caab566f88f0501279ecb)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Dockerfile

@@ -3,7 +3,7 @@
 ARG CROSS="false"
 ARG SYSTEMD="false"
 # IMPORTANT: When updating this please note that stdlib archive/tar pkg is vendored
-ARG GO_VERSION=1.18.5
+ARG GO_VERSION=1.18.6
 ARG DEBIAN_FRONTEND=noninteractive
 ARG VPNKIT_VERSION=0.5.0
 ARG DOCKER_BUILDTAGS="apparmor seccomp"

Dockerfile.e2e

@@ -1,4 +1,4 @@
-ARG GO_VERSION=1.18.5
+ARG GO_VERSION=1.18.6
 
 FROM golang:${GO_VERSION}-alpine AS base
 ENV GO111MODULE=off

Dockerfile.simple

@@ -5,7 +5,7 @@
 
 # This represents the bare minimum required to build and test Docker.
 
-ARG GO_VERSION=1.18.5
+ARG GO_VERSION=1.18.6
 
 FROM golang:${GO_VERSION}-buster
 ENV GO111MODULE=off

Dockerfile.windows

@@ -165,7 +165,7 @@ FROM microsoft/windowsservercore
 # Use PowerShell as the default shell
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
 
-ARG GO_VERSION=1.18.5
+ARG GO_VERSION=1.18.6
 ARG GOTESTSUM_VERSION=v1.7.0
 
 # Environment variable notes: