Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/scripts/test-xprog.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+set -e
+[[ $1 =~ (github.com.*)/_test ]] && \
+    echo Testing ${BASH_REMATCH[1]}
+coverprofile=`pwd`/cprofile.out
+if [[ $1 == *"/enterprise/"* ]]; then
+    cd "$(dirname "$(dirname "${BASH_SOURCE[0]}")")"
+fi
+"$@" -test.coverprofile "$coverprofile"