Implement async API for Storage on dev-preview

[brennanMKE]

Is your feature request related to a problem? Please describe.

Provide a Swift Concurrency API for Storage.

Describe the solution you'd like

async/await API

Describe alternatives you've considered

N/A

Is the feature request related to any of the existing Amplify categories?

Storage

Additional context

No response

[github-actions[bot]]

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[github-actions[bot]]

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[royjit]

Released in v2.0.0