[PHP] Fix group parameters in WithHttpInfo method

PR checklist

• Read the contribution guidelines.
• Ran the shell script under ./bin/ to update Petstore sample so that CIs can verify the change. (For instance, only need to run ./bin/{LANG}-petstore.sh, ./bin/openapi3/{LANG}-petstore.sh if updating the {LANG} (e.g. php, ruby, python, etc) code generator or {LANG} client's mustache templates). Windows batch files can be found in .\bin\windows\. If contributing template-only or documentation-only changes which will change sample output, be sure to build the project first.
• Filed the PR against the correct branch: master, 4.1.x, 5.0.x. Default: master.
• Copied the technical committee to review the pull request if your PR is targeting a particular programming language.

Description of the PR

To fix #2945 (closed)

modules/openapi-generator/src/main/resources/php/api.mustache

@@ -178,7 +178,7 @@ use {{invokerPackage}}\ObjectSerializer;
      */
     public function {{operationId}}WithHttpInfo({{^vendorExtensions.x-group-parameters}}{{#allParams}}${{paramName}}{{^required}} = {{#defaultValue}}{{{.}}}{{/defaultValue}}{{^defaultValue}}null{{/defaultValue}}{{/required}}{{#hasMore}}, {{/hasMore}}{{/allParams}}{{/vendorExtensions.x-group-parameters}}{{#vendorExtensions.x-group-parameters}}$associative_array{{/vendorExtensions.x-group-parameters}})
     {
-        $request = $this->{{operationId}}Request({{^vendorExtensions.x-group-parameters}}{{#allParams}}${{paramName}}{{#hasMore}}, {{/hasMore}}{{/allParams}}{{/vendorExtensions.x-group-parameters}}{{#vendorExtensions.x-group-parameters}}{{#allParams}}$associative_array['{{paramName}}']{{#hasMore}}, {{/hasMore}}{{/allParams}}{{/vendorExtensions.x-group-parameters}});
+        $request = $this->{{operationId}}Request({{^vendorExtensions.x-group-parameters}}{{#allParams}}${{paramName}}{{#hasMore}}, {{/hasMore}}{{/allParams}}{{/vendorExtensions.x-group-parameters}}{{#vendorExtensions.x-group-parameters}}$associative_array{{/vendorExtensions.x-group-parameters}});
 
         try {
             $options = $this->createHttpClientOption();

samples/client/petstore/php/OpenAPIClient-php/lib/Api/FakeApi.php

@@ -2807,7 +2807,7 @@ class FakeApi
      */
     public function testGroupParametersWithHttpInfo($associative_array)
     {
-        $request = $this->testGroupParametersRequest($associative_array['required_string_group'], $associative_array['required_boolean_group'], $associative_array['required_int64_group'], $associative_array['string_group'], $associative_array['boolean_group'], $associative_array['int64_group']);
+        $request = $this->testGroupParametersRequest($associative_array);
 
         try {
             $options = $this->createHttpClientOption();

samples/openapi3/client/petstore/php/OpenAPIClient-php/lib/Api/FakeApi.php

@@ -2841,7 +2841,7 @@ class FakeApi
      */
     public function testGroupParametersWithHttpInfo($associative_array)
     {
-        $request = $this->testGroupParametersRequest($associative_array['required_string_group'], $associative_array['required_boolean_group'], $associative_array['required_int64_group'], $associative_array['string_group'], $associative_array['boolean_group'], $associative_array['int64_group']);
+        $request = $this->testGroupParametersRequest($associative_array);
 
         try {
             $options = $this->createHttpClientOption();