Revisit the versions that we use for CI tests in RN SDK

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Xcode 26 (part of macOS Tahoe, which is a future/beta release) has removed Swift 5.6 compatibility libraries (swiftCompatibility56). The Sentry Cocoa SDK 8.58.0 still requires these compatibility libraries. That's the reason why parts of our CI pipelines are still forced to use older ghcr.io/cirruslabs/macos-sequoia-xcode:16.4 runners.

We need to verify if those could be bumped to tahoe when we upgrade the new version of Sentry Cocoa SDK

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RN-493