Update openapi-generator to 7.22.0 and override api.mustache for snake_case form params

Author: mokuzon

generator/pom.xml

@@ -11,7 +11,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-dependency-plugin</artifactId>
-                <version>3.11.0</version>
+                <version>3.10.0</version>
                 <executions>
                     <execution>
                         <id>copy-openapi-generator-cli</id>
@@ -38,6 +38,6 @@
     </build>
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <openapi-generator-version>7.11.0</openapi-generator-version>
+        <openapi-generator-version>7.22.0</openapi-generator-version>
     </properties>
 </project>