applications: nrf_desktop: Test USB next stack integration in CI

Change expands `sample.yaml` file to build some of the configurations
with USB next stack.

Jira: NCSDK-27014

Signed-off-by: Marek Pieta <Marek.Pieta@nordicsemi.no>

Author: MarekPieta

applications/nrf_desktop/sample.yaml

@@ -259,3 +259,35 @@ tests:
       - nrf54h20dk/nrf54h20/cpuapp
     tags: bluetooth ci_build sysbuild
     extra_args: FILE_SUFFIX=release
+  applications.nrf_desktop.zdebug.usb_next:
+    sysbuild: true
+    build_only: true
+    platform_allow: >
+      nrf52840dk/nrf52840 nrf52840gmouse/nrf52840 nrf52840dongle/nrf52840
+    integration_platforms:
+      - nrf52840dk/nrf52840
+      - nrf52840gmouse/nrf52840
+      - nrf52840dongle/nrf52840
+    tags: bluetooth ci_build sysbuild
+    extra_configs:
+      - CONFIG_DESKTOP_USB_STACK_NEXT=y
+  applications.nrf_desktop.zdebug_dongle.usb_next:
+    sysbuild: true
+    build_only: true
+    platform_allow: nrf52840dk/nrf52840
+    integration_platforms:
+      - nrf52840dk/nrf52840
+    tags: bluetooth ci_build sysbuild
+    extra_args: FILE_SUFFIX=dongle
+    extra_configs:
+      - CONFIG_DESKTOP_USB_STACK_NEXT=y
+  applications.nrf_desktop.zdebug_keyboard.usb_next:
+    sysbuild: true
+    build_only: true
+    platform_allow: nrf52840dk/nrf52840
+    integration_platforms:
+      - nrf52840dk/nrf52840
+    tags: bluetooth ci_build sysbuild
+    extra_args: FILE_SUFFIX=keyboard
+    extra_configs:
+      - CONFIG_DESKTOP_USB_STACK_NEXT=y