model : support Rnj-1 (#17811)

* add support for rnj1

* refactor gemma3 to support rnj-1

* address review comments

src/CMakeLists.txt

@@ -67,7 +67,7 @@ add_library(llama
             models/gemma-embedding.cpp
             models/gemma.cpp
             models/gemma2-iswa.cpp
-            models/gemma3-iswa.cpp
+            models/gemma3.cpp
             models/gemma3n-iswa.cpp
             models/glm4-moe.cpp
             models/glm4.cpp