samples: net: wifi: add esp32 platform

Allow espressif platform to be properly tested in CI.

Signed-off-by: Sylvio Alves <[email protected]>

samples/net/wifi/shell/sample.yaml

@@ -80,3 +80,12 @@ tests:
     platform_allow:
       - frdm_rw612
       - rd_rw612_bga
+  sample.net.wifi.esp32:
+    extra_args:
+      - CONFIG_WIFI_BUILD_ONLY_MODE=y
+    platform_allow:
+      - esp32_devkitc_wroom/esp32/procpu
+      - esp32s2_saola
+      - esp32c3_devkitm
+      - esp32s3_devkitm/esp32s3/procpu
+      - esp8684_devkitm