[20.10] update gotestsum to v1.8.2

release notes: https://github.com/gotestyourself/gotestsum/releases/tag/v1.8.2

- Show shuffle seed
- Update tests, and cleanup formats
- Update dependencies
- Test against go1.19, remove go1.15
- Add project name to junit.xml output
- Adding in support for s390x and ppc64le

full diff: https://github.com/gotestyourself/gotestsum/compare/v1.7.0...v1.8.2

(adapted from commit 882ddf4b16)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Dockerfile.windows

@@ -166,7 +166,7 @@ FROM microsoft/windowsservercore
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
 
 ARG GO_VERSION=1.18.9
-ARG GOTESTSUM_VERSION=v1.7.0
+ARG GOTESTSUM_VERSION=v1.8.2
 
 # Environment variable notes:
 #  - GO_VERSION must be consistent with 'Dockerfile' used by Linux.

hack/dockerfile/install/gotestsum.installer

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-: ${GOTESTSUM_VERSION:=v1.7.0}
+: ${GOTESTSUM_VERSION:=v1.8.2}
 
 install_gotestsum() (
 	set -e