PLAYRTS-5543 Update to Xcode 15.4

Description

Use the latest Xcode version available.

[x] I have followed the project's style guidelines.
[x] I have performed a self-review of my own changes.
[x] I have made corresponding changes to the documentation.
[x] My changes do not generate new warnings.
[x] I have tested my changes and I am confident that it works as expected and doesn't introduce any known regressions.
[x] I have reviewed the contribution guidelines.