Fix Calendar displaying value when controlled state is not updated

[Coderxrohan]

Fix: Calendar displays incorrect value when controlled value is not updated

Problem

When the Calendar component is used as a controlled component, it updates its input field optimistically on date selection.
If the parent component intentionally does not update the value in onChange (e.g. user cancels a confirmation dialog), the input temporarily displays an incorrect date.

Solution

• Removed optimistic input updates on date selection
• Ensured the input value is always derived from props.value
• Input now updates only when the external value actually changes

This restores proper controlled component behavior and fixes issue #7428.

Reproducer

https://codesandbox.io/p/sandbox/primereact-calendar-displays-incorrect-value-if-new-value-was-not-applied-in-onchange-sw2547

Calendar: incorrect value is displayed #7428

[Coderxrohan]

The final change stabilizes the Calendar input sync by keeping the latest updateInputfield via a ref, avoiding unstable hook dependencies while preserving existing behavior.