[clang-tidy] enable `modernize-raw-string-literal` and fix existing errors (#55675)

.clang-tidy

@@ -173,7 +173,7 @@ modernize-loop-convert,
 -modernize-make-shared,
 modernize-make-unique,
 -modernize-pass-by-value,
--modernize-raw-string-literal,
+modernize-raw-string-literal,
 modernize-redundant-void-arg,
 -modernize-replace-auto-ptr,
 -modernize-replace-random-shuffle,

paddle/fluid/eager/auto_code_generator/eager_generator.cc

@@ -1666,7 +1666,7 @@ static std::pair<std::string, std::string> GenerateForwardFunctionContents(
         if (!output.dispensable()) {
           std::string input_name =
               output_name.substr(0, output_name.size() - 3);
-          const char* FWD_OUTS_CONTENT_TEMPLATE = "{ \"%s\", ins[\"%s\"] },";
+          const char* FWD_OUTS_CONTENT_TEMPLATE = R"({ "%s", ins["%s"] },)";
           outs_contents_str += paddle::string::Sprintf(
               FWD_OUTS_CONTENT_TEMPLATE, output_name, input_name);
         }
@@ -1690,7 +1690,7 @@ static std::pair<std::string, std::string> GenerateForwardFunctionContents(
               "Inplace op %s has no input corresponding to output %s.",
               op_type,
               output_name));
-      const char* FWD_OUTS_CONTENT_TEMPLATE = "{ \"%s\", ins[\"%s\"] },";
+      const char* FWD_OUTS_CONTENT_TEMPLATE = R"({ "%s", ins["%s"] },)";
       auto inplace_input_name = forward_inplace_map[output_name];
       outs_contents_str += paddle::string::Sprintf(
           FWD_OUTS_CONTENT_TEMPLATE, output_name, inplace_input_name);