Add unit test for validate invite for sub org console role

[sadilchamishka]

Purpose

$subject

Related Issues

• Invite parent user with invalid user store domain cause internal server error wso2/product-is#21460

Related PRs

• Validate user store domain of the parent user invitation flow #402

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 27.64%. Comparing base (caddb52) to head (8c75c3d).
Report is 16 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (caddb52) and HEAD (8c75c3d). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (caddb52)	HEAD (8c75c3d)
	2	1

Additional details and impacted files

@@              Coverage Diff              @@
##               main     #406       +/-   ##
=============================================
- Coverage     41.48%   27.64%   -13.85%     
- Complexity      218      368      +150     
=============================================
  Files            30       50       +20     
  Lines          1680     4145     +2465     
  Branches        188      478      +290     
=============================================
+ Hits            697     1146      +449     
- Misses          940     2911     +1971     
- Partials         43       88       +45     

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