[Silabs] Update WiseConnect-wifi-bt-sdk to 2.10.3 for RS9116 (#36117)

* Updated wiseconnect pointer to 2.10.3 and added changes for wpa_wpa2_mixed security type for rs9116 board

* updated example-efr32.yaml and release_artifacts.yaml with docker build version

* Updated docker version in release_artifacts,smoke_test.yaml and .gitmodules with 2.10.3
diff --git a/.gitmodules b/.gitmodules
index c26ee8f..3f50d30 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -218,7 +218,7 @@
 [submodule "third_party/silabs/wiseconnect-wifi-bt-sdk"]
 	path = third_party/silabs/wiseconnect-wifi-bt-sdk
 	url = https://github.com/SiliconLabs/wiseconnect-wifi-bt-sdk.git
-	branch = 2.10.0
+	branch = 2.10.3
 	platforms = silabs
 [submodule "third_party/silabs/wifi_sdk"]
 	path = third_party/silabs/wifi_sdk