fix(Content): MultiPart.File have no initilizer

[rockmagma02]

Description

fix(Content): MultiPart.File have no initilizer

Motivation and Context

Types of changes

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds core functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (update in the documentation)

Checklist

Go over all the following points, and put an x in all the boxes that apply.
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• I have read the CONTRIBUTION guide. (required)
• My change requires a change to the documentation.
• I have updated the tests accordingly. (required for a bug fix or a new feature)
• I have updated the documentation accordingly.
• I have checked my code via pre-commit run --all-files (required)
• I have ensured swift test pass. (required)
• I have add all license via make addlicense (required)