Fix bug-gh11600.phpt to work with different ICU versions

[nielsdos]

No description provided.

[iluuu1994]

Hmm, for some reason it fails still.

 ========DIFF========
     string(%d) "h:mm%sa"
     string(%d) "4:02%sPM"
003+ int(1689177720)
003- int(1689091320)
========DONE========
FAIL Bug GH-11600: Intl patterns are not parseable DateTime Strings [ext/date/tests/bug-gh11600.phpt] 
=====================================================================

[nielsdos]

It worked yesterday night in Ci.
Looking at the fail now: the timestamp is wrong, this timestamp that CI outputs corresponds to 12th of July instead of 11th. Somehow parsing is taking todays date

[iluuu1994]

/cc @derickr

[iluuu1994]

@nielsdos Should be fixed now. The formatter just outputs the time, so we need to supply the date.