Refactor : src/components/AgendaItems/AgendaItemsUpdateModal.test.tsx from Jest to Vitest

[prayanshchh]

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.

Acceptane Criteria

1. Replace Jest-specific functions and mocks with Vitest equivalents and rename from test.tsx to spec.tsx
2. Ensure all tests in src/components/AgendaItems/AgendaItemsUpdateModal.test.tsx 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/

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[ShubhanshuOO7]

Hi @palisadoes @prayanshchh I would like to work on this issue, could you please assign it to me?

[gurramkarthiknetha]

If no one is currently working on this issue, I would like to take it on. Please assign it to me.

[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.

[mandeepnh5]

Can i work on this issue?