bug#72098: [core-updates] Icecat dependency icu4c-73 fails its tests

[Leo Famulari]

On core-updates commit dd9660264b39b. the icu4c-73 package fails its
tests like this:

------
make[2]: Leaving directory 
'/tmp/guix-build-icu4c-73.1.drv-0/icu/source/test/cintltst'
-------------
| ***     FAILING TEST SUMMARY FOR:              intltest  
         TestHebrewCalendarInTemporalLeapYear
      CalendarTest
   format
| *** END FAILING TEST SUMMARY FOR:              intltest
---------------
ALL TESTS SUMMARY:
ok:  testdata iotest cintltst
===== ERRS:  intltest
make[1]: *** [Makefile:91: check-recursive] Error 1
make[1]: Leaving directory '/tmp/guix-build-icu4c-73.1.drv-0/icu/source/test'
make: *** [Makefile:153: check-recursive] Error 2

Test suite failed, dumping logs. 
error: in phase 'check': uncaught exception:
------

There's actually a patch applied that is supposed to fix this, and it
does work on master, but not on core-updates.

Any ideas?