Apply baseName fix to php-nextgen and psr-18 templates

Author: ksvirkou-hubspot

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

@@ -732,7 +732,7 @@ use {{invokerPackage}}\ObjectSerializer;
 
         $formData = $formDataProcessor->prepare([
         {{/-first}}
-            '{{paramName}}' => ${{paramName}},
+            '{{baseName}}' => ${{paramName}},
         {{#-last}}
         ]);
 

modules/openapi-generator/src/main/resources/php/libraries/psr-18/api.mustache

@@ -612,7 +612,7 @@ use function sprintf;
 
         $formData = $formDataProcessor->prepare([
         {{/-first}}
-            '{{paramName}}' => ${{paramName}},
+            '{{baseName}}' => ${{paramName}},
         {{#-last}}
         ]);