Uml 3013 kick off one login process

[MishNajam]

Purpose

Ticket that kicks off the one login authorisation process when clicking on a "Sign in via One Login" button.
This button is on a page behind the ALLOW_GOV_ONE_LOGIN feature flag.

Fixes UML-3013

Approach

• On dev this will set the homepage to be a temporary onelogin page

Learning

Did not wire in factories as part of previous tickets. Have now wired in factories in the service-api ConfigProvider.php

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 #2369 (d53a040) into main (c434ccb) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main    #2369      +/-   ##
============================================
+ Coverage     92.01%   92.03%   +0.02%     
- Complexity     1459     1463       +4     
============================================
  Files           276      279       +3     
  Lines          6638     6655      +17     
============================================
+ Hits           6108     6125      +17     
  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	89.21% <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)
.../src/App/src/Service/Aws/SecretsManagerFactory.php	100.00% <100.00%> (ø)
...vice-front/app/src/Actor/src/Form/OneLoginForm.php	100.00% <100.00%> (ø)
...rc/Common/src/Service/OneLogin/OneLoginService.php	100.00% <100.00%> (ø)

[cooperaj]

Same here I guess (and everywhere else). Sorry, I should have picked this up earlier. PHPStorm refactoring should make it easy.

[MishNajam]

I've added all these PR changes and have refactored classes and methods.