fix(endpoint): do not modify context param names (#617)

Author: kuhe

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/CommandGenerator.java

@@ -204,7 +204,7 @@ private void generateEndpointParameterInstructionProvider() {
                         parameterFinder.getContextParams(operationInput).forEach((name, type) -> {
                             writer.write(
                                 "$L: { type: \"contextParams\", name: \"$L\" },",
-                                name, EndpointsParamNameMap.getLocalName(name)
+                                name, name
                             );
                         });
                         parameterFinder.getClientContextParams().forEach((name, type) -> {