[BUG] compilation issues with output from kotlin-vertx server generator

output from kotlin-vertx won't compile in the latest master (vertx 4.x) and previous stable version (vertx 3.x).

[ERROR] C:\Users\User\Code\openapi-generator2\samples\server\petstore\kotlin\vertx\src\main\kotlin\org\openapitools\server\api\verticle\UserApiVertxProxyHandler.kt:[162,33] Unresolved reference: launch
[ERROR] C:\Users\User\Code\openapi-generator2\samples\server\petstore\kotlin\vertx\src\main\kotlin\org\openapitools\server\api\verticle\UserApiVertxProxyHandler.kt:[162,46] Class 'kotlinx.coroutines.CoroutineDispatcher' was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.1.0, expected version is 1.6.0.
[ERROR] The class is loaded from C:/Users/User/.m2/repository/org/jetbrains/kotlinx/kotlinx-coroutines-core-jvm/1.10.2/kotlinx-coroutines-core-jvm-1.10.2.jar!/kotlinx/coroutines/CoroutineDispatcher.class
[ERROR] C:\Users\User\Code\openapi-generator2\samples\server\petstore\kotlin\vertx\src\main\kotlin\org\openapitools\server\api\verticle\UserApiVertxProxyHandler.kt:[163,46] Suspend function 'loginUser' should be called only from a coroutine or another suspend function
[ERROR] C:\Users\User\Code\openapi-generator2\samples\server\petstore\kotlin\vertx\src\main\kotlin\org\openapitools\server\api\verticle\UserApiVertxProxyHandler.kt:[168,25] Unresolved reference: it
[ERROR] C:\Users\User\Code\openapi-generator2\samples\server\petstore\kotlin\vertx\src\main\kotlin\org\openapitools\server\api\verticle\UserApiVertxProxyHandler.kt:[168,40] Unresolved reference: it
[ERROR] C:\Users\User\Code\openapi-generator2\samples\server\petstore\kotlin\vertx\src\main\kotlin\org\openapitools\server\api\verticle\UserApiVertxProxyHandler.kt:[186,21] Class 'kotlinx.coroutines.GlobalScope' was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.1.0, expected version is 1.6.0.
[ERROR] The class is loaded from C:/Users/User/.m2/repository/org/jetbrains/kotlinx/kotlinx-coroutines-core-jvm/1.10.2/kotlinx-coroutines-core-jvm-1.10.2.jar!/kotlinx/coroutines/GlobalScope.class
[ERROR] C:\Users\User\Code\openapi-generator2\samples\server\petstore\kotlin\vertx\src\main\kotlin\org\openapitools\server\api\verticle\UserApiVertxProxyHandler.kt:[186,33] Unresolved reference: launch
[ERROR] C:\Users\User\Code\openapi-generator2\samples\server\petstore\kotlin\vertx\src\main\kotlin\org\openapitools\server\api\verticle\UserApiVertxProxyHandler.kt:[186,46] Class 'kotlinx.coroutines.CoroutineDispatcher' was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.1.0, expected version is 1.6.0.
[ERROR] The class is loaded from C:/Users/User/.m2/repository/org/jetbrains/kotlinx/kotlinx-coroutines-core-jvm/1.10.2/kotlinx-coroutines-core-jvm-1.10.2.jar!/kotlinx/coroutines/CoroutineDispatcher.class
[ERROR] C:\Users\User\Code\openapi-generator2\samples\server\petstore\kotlin\vertx\src\main\kotlin\org\openapitools\server\api\verticle\UserApiVertxProxyHandler.kt:[187,46] Suspend function 'updateUser' should be called only from a coroutine or another suspend function
[ERROR] C:\Users\User\Code\openapi-generator2\samples\server\petstore\kotlin\vertx\src\main\kotlin\org\openapitools\server\api\verticle\UserApiVertxProxyHandler.kt:[192,25] Unresolved reference: it
[ERROR] C:\Users\User\Code\openapi-generator2\samples\server\petstore\kotlin\vertx\src\main\kotlin\org\openapitools\server\api\verticle\UserApiVertxProxyHandler.kt:[192,40] Unresolved reference: it
[ERROR] -> [Help 1]
[ERROR]

Start by regenerating and compiling the Kotlin Vert.x Petstore sample, focusing on UserApiVertxProxyHandler.kt and the reported lines around launch, loginUser, and updateUser. Check the Kotlin and kotlinx.coroutines versions involved in the generated output; done means the sample compiles successfully for both Vert.x 4.x and 3.x.