How to become a GitLab talent ambassador

Why is this change being made?

This is the first iteration of a new page in the hiring handbook that outlines the steps to becoming a talent ambassador for GitLab. Here's the associated issue where we're working through more details prior to merging to the handbook.

Does this MR meet the acceptance criteria?

Conformity

• Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what