Allow admin to change sso_enabled users email

[knolleary]

Description

This allows an admin user to modify the email of an sso_enabled user.

As part of doing this, it will clear the sso_enabled flag on the user - as their new email may no longer be covered by an existing sso configuration. The flag will get re-set the next time they log in via sso with the new email.

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass

[codecov]

Codecov Report

Merging #2605 (fa8105d) into main (009a6b6) will decrease coverage by 9.40%.
Report is 4 commits behind head on main.
The diff coverage is 75.00%.

❗ Current head fa8105d differs from pull request most recent head 41f4a9f. Consider uploading reports for the commit 41f4a9f to get more accurate results

@@            Coverage Diff             @@
##             main    #2605      +/-   ##
==========================================
- Coverage   39.79%   30.40%   -9.40%     
==========================================
  Files         527      229     -298     
  Lines       18365     9245    -9120     
  Branches     4312     1924    -2388     
==========================================
- Hits         7309     2811    -4498     
+ Misses      11056     6434    -4622     

Flag	Coverage Δ
backend	30.40% <75.00%> (-44.29%)	⬇️
frontend	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
forge/routes/api/shared/users.js	38.79% <75.00%> (-41.38%)	⬇️

... and 452 files with indirect coverage changes

[hardillb]

only needs removing