Need better error output when chip-tool struct members are not quoted. (

#14906)

chip-tool expects struct member names in double-quotes. When that does
not happen, it does not make it clear that's what it expects.

Adjust the error message to say what needs to happen.

examples/chip-tool/commands/clusters/ComplexArgument.h

@@ -205,14 +205,14 @@ class ComplexArgumentParser
         return CHIP_NO_ERROR;
     }
 
-    static CHIP_ERROR EnsureMemberExist(const char * label, bool hasMember)
+    static CHIP_ERROR EnsureMemberExist(const char * label, const char * memberName, bool hasMember)
     {
         if (hasMember)
         {
             return CHIP_NO_ERROR;
         }
 
-        ChipLogError(chipTool, "%s is required.", label);
+        ChipLogError(chipTool, "%s is required.  Should be provided as {\"%s\": value}", label, memberName);
         return CHIP_ERROR_INVALID_ARGUMENT;
     }
 

examples/chip-tool/templates/ComplexArgumentParser-src.zapt

@@ -9,7 +9,7 @@ CHIP_ERROR ComplexArgumentParser::Setup(const char * label, {{zapTypeToEncodable
 
     {{#zcl_struct_items}}
     {{#unless isOptional}}
-    ReturnErrorOnFailure(ComplexArgumentParser::EnsureMemberExist("{{parent.name}}.{{asLowerCamelCase label}}", value.isMember("{{asLowerCamelCase label}}")));
+    ReturnErrorOnFailure(ComplexArgumentParser::EnsureMemberExist("{{parent.name}}.{{asLowerCamelCase label}}", "{{asLowerCamelCase label}}", value.isMember("{{asLowerCamelCase label}}")));
     {{/unless}}
     {{/zcl_struct_items}}