Fix inconsistency with the dates used by the date-based ACEs

ACE#getStatus defines a date variable in UTC

Calendar now = new GregorianCalendar(); 

whereas UpdateACEStatusWork#work defines a date with a timezone

        String formattedDate = FORMATTER.format(ZonedDateTime.now());

Analysis of the problem:

1. an date-based ACE with a "begin" date is set, for example at 2023-08-01 00:00:00.000Z
2. UpdateACEStatusWork#work is triggered and it computes a formattedDate with FORMATTER.format(ZonedDateTime.now()) => it builds a date based on the current timezone, for example at minight local time CEST, it will be "2023-08-01 00:00:00" whereas the UTC date is still "2023-07-31 22:00:00"
3. session.queryAndFetch will find the previously defined ACE because the dates match => this is incorrect because the current time is not 00:00:00.000Z
4. session#setACP is called => it adds a "permission modified" event in the audit
5. but ACE#getStatus will return PENDING and the ACE will not be effective: because the current time is still before the begin date set on the ACE
6. at the end, fireACEStatusUpdatedEvent is called too and sends a notification that the ACE is not effective whereas it is not

Solution:

the formattedDate should be computed in UTC to match the timezone used to save the dates in the database

Workaround:

Add -Duser.timezone=GMT to JAVA_OPTS in nuxeo.conf