feat(api/http): properly handle Files in Body.form, closes #7390

[amrbashir]

What kind of change does this PR introduce?

• Bugfix
• Feature
• Docs
• New Binding issue #___
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change?

• Yes, and the changes were approved in issue #___
• No

Checklist

• When resolving issues, they are referenced in the PR's title (e.g fix: remove a typo, closes #___, #___)
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.
• I have added a convincing reason for adding this feature, if necessary

Other information

[lucasfernog]

@amrbashir what do you think about my last commit? Seems like using a File will usually require us to read the bytes anyway, so it doesn't make much sense to have two separate functions.

[amrbashir]

yeah looks better than my solution, I will update the change log