Gitlab upgrade to 13.10.3

CHORE

Why

Upgrade the Gitlab package to 13.10.3

Refer to the developer documentation for details.
High level steps:

• diff values.yaml from new and previous chart version to identify any significant changes. Also can review release notes of new version to understand what has changed.
• make a new dev branch
• delete the entire ./chart directory
• kpt pkg get new gitlab code into new ./chart directory
• make all necessary customizations as outlined in the top level change log
  cross-reference the code from the previous version
• test bigbang deployment with new code
• create package merge request and merge it
• create new repo tag
• create BigBang MR to update the gitlab tag