refactor(translator, executor): remove redundant bytes.Clone calls for improved performance

- Replaced all instances of `bytes.Clone` with direct references to enhance efficiency.
- Simplified payload handling across executors and translators by eliminating unnecessary data duplication.

internal/translator/antigravity/gemini/antigravity_gemini_request.go

@@ -6,7 +6,6 @@
 package gemini
 
 import (
-	"bytes"
 	"fmt"
 	"strings"
 
@@ -34,7 +33,7 @@ import (
 // Returns:
 //   - []byte: The transformed request data in Gemini API format
 func ConvertGeminiRequestToAntigravity(modelName string, inputRawJSON []byte, _ bool) []byte {
-	rawJSON := bytes.Clone(inputRawJSON)
+	rawJSON := inputRawJSON
 	template := ""
 	template = `{"project":"","request":{},"model":""}`
 	template, _ = sjson.SetRaw(template, "request", string(rawJSON))