Add validation track competency table

Why is this change being made?

Per Product#1234 (comment 367214231) we are expanding the competency.

Google Document here: https://docs.google.com/document/d/1qYCMZ60o0lV_hwPU9eiTs5MkpYVxGAMXmyU6X4j8eb4/edit Assessment for ICs: https://docs.google.com/forms/d/e/1FAIpQLSfnCakKLzC9dT-YRipO3j6o4PVPQ2v7nlj9oFU-EJkVMpTRbg/viewform?usp=sf_link

Actions

• Initial and structural review by @kencjohnston
• Product wide review request in #product in slack - @jmeshell
• Product leadership review by @gl-product-leadership - @jmeshell
• Final review and merge by @sfwgitlab

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
• 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.
  • 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.

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