Write test for Backlog task status dropdown feature

[coderabbitai]

Context

A test was skipped in PR #1391 as part of a hotfix to show task status dropdown for backlog task status.

Skipped test:

it.skip('should show text Backlog when a task with Backlog status is passed down.', () => {
    const oldProgress = 100;
    const oldStatus = BACKEND_TASK_STATUS.BACKLOG;

    render(
        <TaskStatusDropdown
            oldProgress={oldProgress}
            oldStatus={oldStatus}
            onChange={onChange}
        />
    );
    const element = screen.getByTestId('task-status-backlog');
    expect(element).toHaveTextContent('Backlog');
});

File: __tests__/Unit/Components/Tasks/TaskStatusDropdown.test.tsx

Task

• Unskip and fix the test for backlog status display
• Ensure the test properly validates the backlog status behavior in TaskStatusDropdown component
• Verify all related test cases are passing

References

• PR: hotfix: show task status dropdown to backlog task status #1391
• Comment: hotfix: show task status dropdown to backlog task status #1391 (comment)
• Requested by: @AnujChhikara