🐛 fix(bal-file-upload): balRejectedFile event does not trigger for multiple files

[XavierBlumbergBaloise]

Current Behavior

When a user uploads multiple 'invalid' files, balRejectedFile event only triggers for the first invalid file

Expected Behavior

I expect when multiple files are added, balRejectedFile event is triggered multiple times for all invalid files.
(OR: new feature: FileUploadRejectedFile can contain an array of files (File[]) instead of just 1 file, then it's sufficient to call the event once containing all the Files[] and Reasons[] affected)

Steps to Reproduce

1. load multiple invalid files to bal-file-upload component
2. only first invalid file is triggered by balRejectedFile event

Version

17.3.0

Browsers

Microsoft Edge

Device

Desktop

Code Reproduction URL

https://design.baloise.dev/?path=/story/components-form-fileupload--basic&globals=framework:react

Additional Information

No response

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