Suffix clients with Client after service name

Author: nateprewitt

codegen/core/src/main/java/software/amazon/smithy/python/codegen/ClientGenerator.java

@@ -57,7 +57,7 @@ private void generateService(PythonWriter writer) {
         var pluginSymbol = CodegenUtils.getPluginSymbol(context.settings());
         writer.addLogger();
 
-        writer.openBlock("class $L:", "", serviceSymbol.getName(), () -> {
+        writer.openBlock("class $LClient:", "", serviceSymbol.getName(), () -> {
             var docs = service.getTrait(DocumentationTrait.class)
                     .map(StringTrait::getValue)
                     .orElse("Client for " + serviceSymbol.getName());