Cannot create presigned request from customized request

[rcoh]

Describe the feature

Currently, if you call .customize() on a operation builder, you lose the ability to create a presigned request!

Use Case

I want to add additional presigned request parameters.

Proposed Solution

No response

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

A note for the community

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[rcoh]

This landed in yesterday's release

[github-actions]

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