builderrors should report bad Gramex use to CTO team, ignoring granted exceptions

• If a project uses FunctionHandler, cto@gramener.com gets an email
• If this persists, a build error should be raised (?)
• If the CTO team grants an exception (stored in Google Docs? Some YAML file somewhere?) the build error should not be reported
• Review changes via git diff $(git rev-list -n1 --before="1 week ago" HEAD) gramex.yaml