fix: set tintAdjustmentMode to .normal

[JohannSzck]

Changes description

Add and set tintAdjustmentMode property to .normal for the imageView of VitaminButton

Context

The image tint color is changing when a UIAlertController is presented. Setting tintAdjustmentMode to .normal fix this problem.

You can see the change in the before/after provided in the screenshots section of this PR.

Checklist

• [x] Make sure you are requesting to pull a topic/feature/bugfix branch. Please, don't request directly from your main!
• [x] Check commits & PR names matches our requested structure. It must follow the https://www.conventionalcommits.org pattern.
• [x] Check your code additions will fail neither code linting checks.
• [x] I have reviewed the submitted code.
• [x] I have tested on an iPhone device/simulator.
• [x] I have tested on an iPad device/simulator.
• [ ] If it includes design changes, please ask for a review design-system-core-team-design GitHub team.

Does this introduce a breaking change?

• No

Screenshots

iPhone

As you can see below the tint color of the icon stay the same with an AlertController presented.

Before	After

[CLAassistant]

All committers have signed the CLA.

[sonarcloud[bot]]

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