Add ability to post stage-wise results to Slack
Adds ability to the executable to post a message to slack and optionally include a summary table extracted from stage wise reports:
exe/gitlab-qa-report --post-to-slack 'this is a test message'
exe/gitlab-qa-report --post-to-slack 'this is a test message' --include-summary-table '/path/to/stage/reports/*.xml'
Examples are in #qa-notifications-test-channel
Related to: https://gitlab.com/gitlab-org/quality/team-tasks/-/issues/372
Edited by Sanad Liaquat