deprecate http-02x presign APIs (#3823)

## Motivation and Context
* https://github.com/smithy-lang/smithy-rs/issues/1925
* https://github.com/awslabs/aws-sdk-rust/issues/977

## Description
Deprecate http-02x APIs from inlineable `PresignedRequest` API. These
should have been feature gated originally but they weren't. For now
we'll mark them deprecated and encourage people to move to the 1.x
equivalents.

## Checklist
<!--- If a checkbox below is not applicable, then please DELETE it
rather than leaving it unchecked -->
- [x ] For changes to the AWS SDK, generated SDK code, or SDK runtime
crates, I have created a changelog entry Markdown file in the
`.changelog` directory, specifying "aws-sdk-rust" in the `applies_to`
key.

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