Date Picker / Cell title does not reflect nzFormat

[RubenVermeulen]

Reproduction link

https://stackblitz.com/edit/ng-zorro-antd-ivy-kzwn8f?file=src%2Fapp%2Fapp.component.ts

Steps to reproduce

• Focus the date picker
• Hover over a day
• You'll notice a tooltip shows the date format

What is expected?

The date format of the tooltip should equal the date format of the input once a date is selected.

What is actually happening?

The date format of the tooltip is based on locale, and not on nzFormat.

Environment	Info
ng-zorro-antd	18.1.1
Browser	All

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You can't make the assumption a locale represent the proper date format. When nzFormat is explicitly set it's expected the complete date picker adheres to this new format.