[FIX] Added form error validation for duplicated priority name

[aleksandernsilva]

Proposed changes (including videos or screenshots)

Issue(s)

Steps to test or reproduce

Further comments

OC-290

[codecov[bot]]

Codecov Report

Merging #27506 (013ca24) into feature/omnichannel-priorities (9d9d5c0) will increase coverage by 1.10%. The diff coverage is n/a.

@@                        Coverage Diff                         @@
##           feature/omnichannel-priorities   #27506      +/-   ##
==================================================================
+ Coverage                           42.59%   43.69%   +1.10%     
==================================================================
  Files                                 840      813      -27     
  Lines                               17705    17186     -519     
  Branches                             1979     1904      -75     
==================================================================
- Hits                                 7541     7509      -32     
+ Misses                               9909     9427     -482     
+ Partials                              255      250       -5     

Flag	Coverage Δ
e2e	43.69% <ø> (+1.10%)	:arrow_up:

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