samples: wifi: softap: Split nRF54H20 and nRF54L15 target entries

Separate the target entries for nRF54H20 and nRF54L15 to
maintain distinct extra arguments.

Signed-off-by: Triveni Danda <[email protected]>

Author: D-Triveni

samples/wifi/softap/sample.yaml

@@ -44,17 +44,29 @@ tests:
       - ci_build
       - sysbuild
       - ci_samples_wifi
-  sample.nrf7002eb_interposer_p1.nrf7002eb.softap:
+  sample.nrf54h20.softap:
     sysbuild: true
     build_only: true
     extra_args:
       - softap_SHIELD="nrf7002eb_interposer_p1;nrf7002eb"
       - softap_SNIPPET=nrf70-wifi
     integration_platforms:
       - nrf54h20dk/nrf54h20/cpuapp
-      - nrf54l15dk/nrf54l15/cpuapp
     platform_allow:
       - nrf54h20dk/nrf54h20/cpuapp
+    tags:
+      - ci_build
+      - sysbuild
+      - ci_samples_wifi
+  sample.nrf54l15.softap:
+    sysbuild: true
+    build_only: true
+    extra_args:
+      - softap_SHIELD="nrf7002eb_interposer_p1;nrf7002eb"
+      - softap_SNIPPET=nrf70-wifi
+    integration_platforms:
+      - nrf54l15dk/nrf54l15/cpuapp
+    platform_allow:
       - nrf54l15dk/nrf54l15/cpuapp
     tags:
       - ci_build