UML-3121 make redirect uri dynamic

[MishNajam]

Purpose

Make redirect_uri use the correct domain depending on environments

Fixes UML-3121

Approach

Uses the Mezzio serverUrlHelper and urlHelper classes in service-front and passes this down to service-api.

Learning

The $redirectUrl being passed from the frontend to the api needs to match the redirect_url set in the docker dependencies file.
Selecting Welsh modifies the URL by adding '/cy/'. We have removed this from the redirectUrl to make this match.
The ui_locale value is stored in the AuthSession to allow returning from one login to a welsh page if selected.

Checklist

• I have performed a self-review of my own code

• I have added relevant logging with appropriate levels to my code
• New event_codes have been documented on the wiki page
• I have updated documentation (Confluence/GitHub wiki/tech debt doc) where relevant

• I have added tests to prove my work

• I have added welsh translation tags and updated translation files
• I have run an accessibility tool on any pages I have made changes to and fixed any issues found
• I have notified the Interaction Designer of any content changes so that appropriate screenshots/flow diagram changes can be made
• The product team have tested these changes

[codecov]

Codecov Report

Merging #2390 (4e050db) into main (e140372) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##               main    #2390   +/-   ##
=========================================
  Coverage     92.03%   92.03%           
  Complexity     1463     1463           
=========================================
  Files           279      279           
  Lines          6655     6656    +1     
=========================================
+ Hits           6125     6126    +1     
  Misses          513      513           
  Partials         17       17           

Flag	Coverage Δ
use-an-lpa-admin	88.81% <ø> (ø)
use-an-lpa-api	96.84% <100.00%> (+0.06%)	⬆️
use-an-lpa-front	89.22% <100.00%> (+0.02%)	⬆️

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

Files	Coverage Δ
...ntication/OneLoginAuthenticationRequestService.php	100.00% <100.00%> (ø)
...rc/Common/src/Service/OneLogin/OneLoginService.php	100.00% <100.00%> (ø)

[cooperaj]

This should ideally be When I click the login button. The assertion on the language would then be in the Then.

The usefulness of the context files is that a step can create state that a later step can access. In this case you'd want to set the locale in the context when you request to view the content in welsh.