fix: Allow hyphens in usernames (DEV-3306)

[siers]

Pull Request Checklist

Task Description/Number

The user images-reviewer-user is failing Username validation leading to the /admin/users view not being available. There are more users with hyphens on both prods, so they'll now be allowed unless the db is cleaned up at some later point.

Issue Number: DEV-

PR Type

• build/chore: maintenance tasks (no production code change)
• docs: documentation changes (no production code change)
• feat: represents new features
• fix: represents bug fixes
• perf: performance improvements
• refactor: represents production code refactoring
• test: adding or refactoring tests (no production code change)

Basic requirements for bug fixes and features

• Tests for the changes have been added
• Docs have been added / updated

Does this PR introduce a breaking change?

• Yes

Does this PR change client-test-data?

• Yes

[linear]

DEV-3306 Form to search for an existing user on Project Members is not loading

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (eac5751) 11.74% compared to head (6af9366) 88.58%.
Report is 76 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #3055       +/-   ##
===========================================
+ Coverage   11.74%   88.58%   +76.83%     
===========================================
  Files         246      263       +17     
  Lines       22907    22659      -248     
===========================================
+ Hits         2690    20072    +17382     
+ Misses      20217     2587    -17630     

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