fix: always validate programmatic date updates for picker components

[blm768]

HTML constraint validation can apply even if we're not using the native date picker, so I don't see a strong reason to skip checkHtml5Validity().

Proposed Changes

Previously, date and time pickers would only try to clear their constraint validation messages on direct user updates or blur events when in desktop mode, not on programmatic updates. In the video below, note that I have to blur the field before the validation message fixes itself:

before.webm

This is inconsistent with the behavior of other inputs, which will clear their validation messages even if not updated due to direct user input.

after.webm

Here's the code I used to demonstrate the issue:

<script setup lang="ts">
import { OButton, ODatepicker } from '@oruga-ui/oruga-next';
import { ref } from 'vue';

const date = ref<Date | undefined>(undefined);

</script>

<template>
  <main>
    <OField label="Date">
      <ODatepicker v-model="date" required />
    </OField>
    <OField>
      <OButton type="button" @click="date = new Date()">Set Date</OButton>
    </OField>
  </main>
</template>

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 17.86%. Comparing base (484cfe8) to head (48308f6).
Report is 68 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff              @@
##           develop     #927       +/-   ##
============================================
- Coverage    56.71%   17.86%   -38.86%     
============================================
  Files           30      292      +262     
  Lines         1511     7315     +5804     
  Branches       544     2120     +1576     
============================================
+ Hits           857     1307      +450     
- Misses         654     5058     +4404     
- Partials         0      950      +950     

Flag	Coverage Δ
oruga-next	17.86% <100.00%> (-38.86%)	⬇️

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