backport connection poisoning to hyper 1.x client (#3795)

## Motivation and Context
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<!--- If it fixes an open issue, please link to the issue here -->
https://github.com/smithy-lang/smithy-rs/issues/1925

## Description
Backports connection poisoning that hyper 0.14 HTTP client has to the
hyper 1.x client.

See also:
* upstream support: https://github.com/hyperium/hyper-util/pull/121

## Testing
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## Checklist
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rather than leaving it unchecked -->
- [X] For changes to the smithy-rs codegen or runtime crates, I have
created a changelog entry Markdown file in the `.changelog` directory,
specifying "client," "server," or both in the `applies_to` key.

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