Close ClientFactory in ArmeriaResteasyClient

[minwoox]

The ClientFactory that is created for ArmeriaResteasyClient is not closed after its use:

armeria/resteasy/src/main/java/com/linecorp/armeria/client/resteasy/ArmeriaResteasyClientBuilder.java

Line 91 in ac246c3

return new ArmeriaResteasyClientBuilder(webClientBuilder, ClientFactory.builder());

[minwoox]

Will be closed by #5833