chore: unify host and host prefix middleware (#458)

Author: wooj2

AWSClientRuntime/Sources/IMDS/IMDSConfig.swift

@@ -7,7 +7,7 @@
 import AwsCommonRuntimeKit
 import ClientRuntime
 
-//TODO: support more config options that are required to be supported when the CRT adds the ability to pass them down.
+// TODO: support more config options that are required to be supported when the CRT adds the ability to pass them down.
 public struct IMDSConfig {
     let retries: Int
     public init(retries: Int = 3) {

codegen/smithy-aws-swift-codegen/src/test/kotlin/software/amazon/smithy/aws/swift/codegen/PresignerGeneratorTests.kt

@@ -42,6 +42,7 @@ class PresignerGeneratorTests {
                                   .withSigningRegion(value: config.signingRegion)
                     var operation = ClientRuntime.OperationStack<GetFooInput, GetFooOutputResponse, GetFooOutputError>(id: "getFoo")
                     operation.initializeStep.intercept(position: .after, middleware: GetFooInputURLPathMiddleware())
+                    operation.initializeStep.intercept(position: .after, middleware: GetFooInputURLHostMiddleware())
                     operation.buildStep.intercept(position: .before, middleware: AWSClientRuntime.EndpointResolverMiddleware(endpointResolver: config.endpointResolver, serviceId: serviceName))
                     operation.buildStep.intercept(position: .before, middleware: AWSClientRuntime.UserAgentMiddleware(metadata: AWSClientRuntime.AWSUserAgentMetadata.fromEnv(apiMetadata: AWSClientRuntime.APIMetadata(serviceId: serviceName, version: "1.0.0"))))
                     operation.serializeStep.intercept(position: .after, middleware: GetFooInputHeadersMiddleware())
@@ -98,6 +99,7 @@ class PresignerGeneratorTests {
                                   .withSigningRegion(value: config.signingRegion)
                     var operation = ClientRuntime.OperationStack<PostFooInput, PostFooOutputResponse, PostFooOutputError>(id: "postFoo")
                     operation.initializeStep.intercept(position: .after, middleware: PostFooInputURLPathMiddleware())
+                    operation.initializeStep.intercept(position: .after, middleware: PostFooInputURLHostMiddleware())
                     operation.buildStep.intercept(position: .before, middleware: AWSClientRuntime.EndpointResolverMiddleware(endpointResolver: config.endpointResolver, serviceId: serviceName))
                     operation.buildStep.intercept(position: .before, middleware: AWSClientRuntime.UserAgentMiddleware(metadata: AWSClientRuntime.AWSUserAgentMetadata.fromEnv(apiMetadata: AWSClientRuntime.APIMetadata(serviceId: serviceName, version: "1.0.0"))))
                     operation.serializeStep.intercept(position: .after, middleware: PostFooInputHeadersMiddleware())
@@ -155,6 +157,7 @@ class PresignerGeneratorTests {
                                   .withSigningRegion(value: config.signingRegion)
                     var operation = ClientRuntime.OperationStack<PutFooInput, PutFooOutputResponse, PutFooOutputError>(id: "putFoo")
                     operation.initializeStep.intercept(position: .after, middleware: PutFooInputURLPathMiddleware())
+                    operation.initializeStep.intercept(position: .after, middleware: PutFooInputURLHostMiddleware())
                     operation.buildStep.intercept(position: .before, middleware: AWSClientRuntime.EndpointResolverMiddleware(endpointResolver: config.endpointResolver, serviceId: serviceName))
                     operation.buildStep.intercept(position: .before, middleware: AWSClientRuntime.UserAgentMiddleware(metadata: AWSClientRuntime.AWSUserAgentMetadata.fromEnv(apiMetadata: AWSClientRuntime.APIMetadata(serviceId: serviceName, version: "1.0.0"))))
                     operation.serializeStep.intercept(position: .after, middleware: PutFooInputHeadersMiddleware())