Refactor FXIOS-9384 - Update Fonts related to LabelButtonHeaderView to use FXFontStyles

[bmihai23]

:scroll: Tickets

Jira ticket Github issue

:bulb: Description

• This PR updates the font style used in the LabelButtonHeaderView class to improve consistency and adaptability to dynamic font sizes.

Before

Light Theme	Dark Theme

After

Light Theme	Dark Theme

:pencil: Checklist

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• [x] Filled in the above information (tickets numbers and description of your work)
• [x] Updated the PR name to follow our PR naming guidelines
• [ ] Wrote unit tests and/or ensured the tests suite is passing
• [ ] When working on UI, I checked and implemented accessibility (minimum Dynamic Text and VoiceOver)
• [ ] If needed, I updated documentation / comments for complex code and public methods
• [ ] If needed, added a backport comment (example @Mergifyio backport release/v120)