Fix EMSL shipping date inconsistency

[cristina-stonepedraza]

Closes #1237

To resolve this, I specified using the UTC time for the date saved when retrieving it, and then formatted the date to YYYY-MM-DD. The date selected in the shipping form and the date displayed with shipping details now match.

[cristina-stonepedraza]

@mslarae13 Is YYYY-MM-DD the preferred date format?

[mslarae13]

YYYY-MM-DD is good
@pkalita-lbl for technical check

[pkalita-lbl]

Two issues:

1. Vuetify 3 changed a lot about how its date picker component works. Because of that the format of the date in the shipping info summary is now out of sync with the format of the date in the shipping info form:

The format of what's shown in the form is controlled here:

nmdc-server/web/src/views/SubmissionPortal/Components/SubmissionContextShippingForm.vue

Line 250 in 54147bb

:model-value="expectedShippingDate?.toLocaleDateString()"

What I would suggest is creating a utility function that takes a date and formats it in the desired format. Then both the form and the summary can call the utility to do the formatting.

2. To do the formatting I would recommend using the Moment.js library that is already a dependency. So the utility function for formatting might look like:

import moment from 'moment';

function formatShippingDate(date: string | Date | null) {
  if (!date) {
    return '';
  }
  return moment(date).format('YYYY-MM-DD');
}

Because the Vuetify 3 date picker uses Date objects as a model instead of a string, UTC vs local time should be handled transparently.