DatePicker setting seconds when showTime is true and showSeconds is false

[LouisTrinczek]

Describe the bug

When showSeconds is false but showTime is true, seconds should be set to zero and not set to the current time seconds.

Same bug as for primeng primefaces/primeng#18567

Reproducer

https://stackblitz.com/edit/vitejs-vite-etgryuao?file=src%2FApp.tsx

System Information

no importance

Steps to reproduce the behavior

Click on Calendar, select any date and look at the preview string below

Expected behavior

I'd expect, that when no showSeconds is set, the date is formatted to for example 12:50:00, and not 12:50:23 (or whatever seconds are in that moment)

[LouisTrinczek]

I may be able to provide a PR for this issue once its triaged.