[Bug Report] When the clearable property of DateTimePicker is set to false, it is not possible to hide the clear button in the popup layer

[cocogg28]

Element UI version

2.15.14

OS/Browsers version

Chrome 130.0.6723.117

Vue version

2.7.16

Reproduction Link

https://github.com/ElemeFE/element/tree/dev/packages

Steps to reproduce

When the clearable property of the DateTimePicker date and time range selector is set to false, it indicates that I do not want users to be able to clear the input field. However, there is still a 'Clear' button next to the 'Confirm' button in the bottom right corner of the calendar

What is Expected?

The clear button is hidden

What is actually happening?

none