Re-point those using `ByteStream` and `SdkBody` to smithy-types (#3076)

# Motivation and Context
A follow-up on #3026

## Description
#3026 moved
- `aws_smithy_http::body::{BoxBody, Error, SdkBody}` to
`aws_smithy_types::body::{BoxBody, Error, SdkBody}`
- `aws_smithy_http::byte_stream::{AggregatedBytes, ByteStream,
error::Error}` to `aws_smithy_types::byte_stream::{AggregatedBytes,
ByteStream, error::Error}`

and also left "breadcrumbs", so that customers could still consume
updated types from `aws_smithy_http` after the move.

This PR turns breadcrumbs into deprecation messages (via
`#[deprecated(...)]`) and updates existing places that used to use moved
types from `aws_smithy_http` to directly depend on `aws_smithy_types`.

## Testing
Relied on tests in CI.

## 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

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