Refactor: src/screens/UserPortal/Organizations from Jest to Vitest

[VanshikaSabharwal]

Is your feature request related to a problem? Please describe.
This file is currently tested using Jest. As part of our migration to Vitest, we need to refactor this file's test cases to align with Vitest's syntax and features.

Acceptance Criteria

1. Replace Jest-specific functions and mocks with Vitest equivalents
2. Ensure all tests in src/screens/UserPortal/Organizations pass after migration using npm run test:vitest
3. Maintain the test coverage for the file as 100% after migration
4. Upload a video or photo for this specific file coverage is 100% in the PR description

Additional context

• Refer to the merged PR for the base Vitest configuration:
  https://github.com/PalisadoesFoundation/talawa-admin/pull/2457/files#diff-9a5a35cf8d7f02b2bba90905714b762560579c4789e9eb4cebb4607980aa3d93
• Vitest documentation:
  https://vitest.dev/

Potential internship candidates

Please read this if you are planning to apply for a Palisadoes Foundation internship

• Student Internship Programs talawa#359

[CoyoteClear340]

I'll be taking on this issue and will make sure to keep you updated on my progress. Thank you for your patience and understanding as I work through it!

@VanshikaSabharwal , @palisadoes Could you please assign this issue to me?

[github-actions]

This issue did not get any activity in the past 10 days and will be closed in 180 days if no update occurs. Please check if the develop branch has fixed it and report again or close the issue.

[raggettii]

Please assign this to me @palisadoes

[CoyoteClear340]

I’m currently wrapping up some ongoing college assignments and other tasks before my end-semester exams begin, so I may need a little extra time to revisit the issue. I’ll do my best to resolve it soon, and if I’m unable to, I’ll let you know so it can be reassigned if needed. Thank you for your understanding!

[palisadoes]

Unassigning due to inactivity and/or no submitted PR. Others need to get a chance. Please let us know whether you want to be reassigned before someone else requests assignment or select another issue.

[shivasankaran18]

Can I work on this issue..? @palisadoes @dhanagopu