Remove duplication of anchor to name mapping

Why is this change being made?

Follow up to !39179 (merged) and !39047 (merged) removing duplication of data.

We should rely on the data/team.yml rather than copying this into every other data file.

Adds a new link_to_team_member(gitlab_handle) helper which returns a link to that user on the team page:

<a href="/company/team/#jamesramsay">James Ramsay</a>

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