samples: bluetooth: pbp_public_broadcast: Fix PACS register issue

[VinitMehta7492]

• Add sink PACS register for PBP public broadcast sink example to make it work with PBP broadcast source

[github-actions]

Hello @VinitMehta7492, and thank you very much for your first pull request to the Zephyr project!
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[VinitMehta7492]

Hello @Thalley ,

Thanks for your review.

I have addressed the comments. Please have a look.

Regards

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
8.3% Duplication on New Code

See analysis details on SonarQube Cloud

[Thalley]

Thanks for fixing this @VinitMehta7492 :)

[github-actions]

Hi @VinitMehta7492!
Congratulations on getting your very first Zephyr pull request merged 🎉🥳. This is a fantastic achievement, and we're thrilled to have you as part of our community!

To celebrate this milestone and showcase your contribution, we'd love to award you the Zephyr Technical Contributor badge. If you're interested, please claim your badge by filling out this form: Claim Your Zephyr Badge.

Thank you for your valuable input, and we look forward to seeing more of your contributions in the future! 🪁