Populate Operation Context Params in Endpoint Instruction Provider

Author: trivikr

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

@@ -299,6 +299,12 @@ private void generateEndpointParameterInstructionProvider() {
                 }
                 paramNames.add(name);
             });
+
+            parameterFinder.getOperationContextParamValues(operationInput).forEach((name, jmesPathForInputinJs) -> {
+                writer.write(
+                   "$L: { type: \"operationContextParams\", name: $L },",
+                   name, jmesPathForInputinJs);
+            });
         }
         writer.write("})")
             .dedent();