chore: [IOBP-981] Add PSP_ERROR outcome into payment flow webpage

[Hantex9]

Short description

This PR adds the PSP_ERROR outcome inside the payment flow webpage

List of changes proposed in this pull request

• Added the PSP_ERROR inside the dropdown shown in the payment flow webpage.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.85%. Comparing base (566ed24) to head (fc16e08).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff            @@
##           master     #441    +/-   ##
========================================
  Coverage   63.85%   63.85%            
========================================
  Files         167      167            
  Lines        5437     5437            
  Branches      746      769    +23     
========================================
  Hits         3472     3472            
+ Misses       1964     1820   -144     
- Partials        1      145   +144     

see 34 files with indirect coverage changes

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