Revert "quarantine: Put the nRF Desktop app back in quarantine"

This reverts commit 08e4609.

The upmerge issues have been addressed for the nRF Desktop application
and the nrf54h20dk/nrf54h20/cpuapp board target.

Signed-off-by: Kamil Piszczek <[email protected]>

Author: kapi-no

scripts/quarantine.yaml

@@ -70,12 +70,6 @@
     - [email protected]/nrf54h20/cpuapp
   comment: "Needs alignment to work with IronSide SE"
 
-- scenarios:
-    - applications.nrf_desktop.*
-  platforms:
-    - [email protected]/nrf54h20/cpuapp
-  comment: "Needs alignment after upmerge"
-
 - scenarios:
     - drivers.counter.basic_api
   platforms: