For Director and Above resignations PBPs to perform the exit interview and send out the survey

Why is this change being made?

To provide clarity around who's the DRI for exit's of Directors in the groups and above. Aligned with conversation on slack: https://gitlab.slack.com/archives/G010QSQCNS1/p1596559134007500?thread_ts=1596551311.006800&cid=G010QSQCNS1

cc @gl-peoplepartners

Author Checklist

• Provided a concise title for the MR
• Added a description to this MR explaining the reasons for the proposed change, per [say-why-not-just-what][transparency]
• Assign this change to the correct DRI
  • If the DRI for the page/s being updated isn’t immediately clear, then assign it to your manager.
  • If your manager does not have merge rights, please ask someone to merge it AFTER it has been approved by your manager in [#mr-buddies][mr-buddies-slack].
  • If the changes relate to any part of the project other than updates to content and/or data files please make sure to ping @gl-static-site-editor in a comment for a review and merge. For example changes to .gitlab-ci.yml, JavaScript/CSS/Ruby code or the layout files.