build: remove OpsGenie alert for Python upgrade failures
build: remove OpsGenie alert for Python upgrade failures

The Community Engineering team has agreed that we would only like to get tagged on Python upgrade notifications, not paged in Ops Genie. This PR removes OG notification and also removes the team-reviewers as that was not working; we are moving to being tagged in the CODEOWNERS file.
edx/acid-block,edx/acid-block,edx/acid-block