fix(gallery): use tokenizer templates for Gemma

Let the model-provided tokenizer template format Gemma conversations instead of maintaining a shared inline prompt template.

Assisted-by: Codex:gpt-5
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

gallery/gemma.yaml

@@ -10,33 +10,5 @@ config_file: |
         - <end_of_turn>
         - <start_of_turn>
     template:
-        chat: |
-            {{.Input }}
-            <start_of_turn>model
-        chat_message: |-
-            <start_of_turn>{{if eq .RoleName "assistant" }}model{{else}}{{ .RoleName }}{{end}}
-            {{ if .FunctionCall -}}
-            {{ else if eq .RoleName "tool" -}}
-            {{ end -}}
-            {{ if .Content -}}
-            {{.Content -}}
-            {{ end -}}
-            {{ if .FunctionCall -}}
-            {{toJson .FunctionCall}}
-            {{ end -}}<end_of_turn>
-        completion: |
-            {{.Input}}
-        function: |
-            <start_of_turn>system
-            You have access to functions. If you decide to invoke any of the function(s),
-            you MUST put it in the format of
-            {"name": function name, "parameters": dictionary of argument name and its value}
-
-            You SHOULD NOT include any other text in the response if you call a function
-            {{range .Functions}}
-            {'type': 'function', 'function': {'name': '{{.Name}}', 'description': '{{.Description}}', 'parameters': {{toJson .Parameters}} }}
-            {{end}}
-            <end_of_turn>
-            {{.Input -}}
-            <start_of_turn>model
+        use_tokenizer_template: true
 name: gemma