[smithy-rs] Re-export HttpRequest and HttpResponse in client crates (#3762)

## Motivation and Context
smithy-lang/smithy-rs#3591

## Description
In early days of smithy-rs, we used to re-export
[Request](https://docs.rs/aws-sdk-s3/0.25.0/aws_sdk_s3/client/customize/struct.Request.html)
and
[Response](https://docs.rs/aws-sdk-s3/0.25.0/aws_sdk_s3/client/customize/struct.Request.html)
types. When we overhauled the underlying smithy runtime from middleware
to orchestrator, we did not re-export the corresponding types
[HttpRequest](https://docs.rs/aws-smithy-runtime-api/latest/aws_smithy_runtime_api/client/orchestrator/type.HttpRequest.html)
and
[HttpResponse](https://docs.rs/aws-smithy-runtime-api/latest/aws_smithy_runtime_api/client/orchestrator/type.HttpResponse.html)
to client crates.

This PR will re-export them in `crate::config::http`.

## Testing
Added a new test file for `ClientRuntimeTypesReExportGenerator.kt` that
verifies re-exports.

## Checklist
<!--- If a checkbox below is not applicable, then please DELETE it
rather than leaving it unchecked -->
- [x] I have updated `CHANGELOG.next.toml` if I made changes to the
smithy-rs codegen or runtime crates
- [x] I have updated `CHANGELOG.next.toml` if I made changes to the AWS
SDK, generated SDK code, or SDK runtime crates

----

_By submitting this pull request, I confirm that you can use, modify,
copy, and redistribute this contribution, under the terms of your
choice._

Author: ysaito1001

sdk/accessanalyzer/src/config.rs

@@ -1358,6 +1358,9 @@ pub use ::aws_smithy_types::config_bag::Layer;
 /// Types needed to configure endpoint resolution.
 pub mod endpoint;
 
+/// HTTP request and response types.
+pub mod http;
+
 /// Types needed to implement [`Intercept`](crate::config::Intercept).
 pub mod interceptors;
 

sdk/accessanalyzer/src/config/http.rs

@@ -0,0 +1,3 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
+pub use ::aws_smithy_runtime_api::client::orchestrator::HttpRequest;
+pub use ::aws_smithy_runtime_api::client::orchestrator::HttpResponse;

sdk/account/src/config.rs

@@ -1337,6 +1337,9 @@ pub use ::aws_smithy_types::config_bag::Layer;
 /// Types needed to configure endpoint resolution.
 pub mod endpoint;
 
+/// HTTP request and response types.
+pub mod http;
+
 /// Types needed to implement [`Intercept`](crate::config::Intercept).
 pub mod interceptors;
 

sdk/account/src/config/http.rs

@@ -0,0 +1,3 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
+pub use ::aws_smithy_runtime_api::client::orchestrator::HttpRequest;
+pub use ::aws_smithy_runtime_api::client::orchestrator::HttpResponse;

sdk/acm/src/config.rs

@@ -1337,6 +1337,9 @@ pub use ::aws_smithy_types::config_bag::Layer;
 /// Types needed to configure endpoint resolution.
 pub mod endpoint;
 
+/// HTTP request and response types.
+pub mod http;
+
 /// Types needed to implement [`Intercept`](crate::config::Intercept).
 pub mod interceptors;
 

sdk/acm/src/config/http.rs

@@ -0,0 +1,3 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
+pub use ::aws_smithy_runtime_api::client::orchestrator::HttpRequest;
+pub use ::aws_smithy_runtime_api::client::orchestrator::HttpResponse;

sdk/acmpca/src/config.rs

@@ -1337,6 +1337,9 @@ pub use ::aws_smithy_types::config_bag::Layer;
 /// Types needed to configure endpoint resolution.
 pub mod endpoint;
 
+/// HTTP request and response types.
+pub mod http;
+
 /// Types needed to implement [`Intercept`](crate::config::Intercept).
 pub mod interceptors;
 

sdk/acmpca/src/config/http.rs

@@ -0,0 +1,3 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
+pub use ::aws_smithy_runtime_api::client::orchestrator::HttpRequest;
+pub use ::aws_smithy_runtime_api::client::orchestrator::HttpResponse;

sdk/amp/src/config.rs

@@ -1358,6 +1358,9 @@ pub use ::aws_smithy_types::config_bag::Layer;
 /// Types needed to configure endpoint resolution.
 pub mod endpoint;
 
+/// HTTP request and response types.
+pub mod http;
+
 /// Types needed to implement [`Intercept`](crate::config::Intercept).
 pub mod interceptors;
 

sdk/amp/src/config/http.rs

@@ -0,0 +1,3 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
+pub use ::aws_smithy_runtime_api::client::orchestrator::HttpRequest;
+pub use ::aws_smithy_runtime_api::client::orchestrator::HttpResponse;