[xcode26.4] Update to Xcode 26.4 Stable

[dalexsoto]

Xcode 26.4 RC and GA are identical.

[vs-mobiletools-engineering-service2]

✅ [CI Build #f037496] Build passed (Build packages) ✅

Pipeline on Agent
Hash: f0374966c70ca05fe382bce5c0f88e3c5e7ffd7b [PR build]

[vs-mobiletools-engineering-service2]

✅ [PR Build #f037496] Build passed (Detect API changes) ✅

Pipeline on Agent
Hash: f0374966c70ca05fe382bce5c0f88e3c5e7ffd7b [PR build]

[vs-mobiletools-engineering-service2]

🔥 Unable to find the contents for the comment: D:\a\1\s\change-detection\results\gh-comment.md does not exist :fire

Pipeline on Agent
Hash: f0374966c70ca05fe382bce5c0f88e3c5e7ffd7b [PR build]

[vs-mobiletools-engineering-service2]

✅ [CI Build #f037496] Build passed (Build macOS tests) ✅

Pipeline on Agent
Hash: f0374966c70ca05fe382bce5c0f88e3c5e7ffd7b [PR build]

[vs-mobiletools-engineering-service2]

🚀 [CI Build #f037496] Test results 🚀

Test results

✅ All tests passed on VSTS: test results.

🎉 All 156 tests passed 🎉

Tests counts

✅ cecil: All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (iOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (MacCatalyst): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (macOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (Multiple platforms): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (tvOS): All 1 tests passed. Html Report (VSDrops) Download
✅ framework: All 2 tests passed. Html Report (VSDrops) Download
✅ fsharp: All 4 tests passed. Html Report (VSDrops) Download
✅ generator: All 5 tests passed. Html Report (VSDrops) Download
✅ interdependent-binding-projects: All 4 tests passed. Html Report (VSDrops) Download
✅ introspection: All 6 tests passed. Html Report (VSDrops) Download
✅ linker: All 44 tests passed. Html Report (VSDrops) Download
✅ monotouch (iOS): All 11 tests passed. Html Report (VSDrops) Download
✅ monotouch (MacCatalyst): All 15 tests passed. Html Report (VSDrops) Download
✅ monotouch (macOS): All 12 tests passed. Html Report (VSDrops) Download
✅ monotouch (tvOS): All 11 tests passed. Html Report (VSDrops) Download
✅ msbuild: All 2 tests passed. Html Report (VSDrops) Download
✅ sharpie: All 1 tests passed. Html Report (VSDrops) Download
✅ windows: All 3 tests passed. Html Report (VSDrops) Download
✅ xcframework: All 4 tests passed. Html Report (VSDrops) Download
✅ xtro: All 1 tests passed. Html Report (VSDrops) Download

macOS tests

✅ Tests on macOS Monterey (12): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Ventura (13): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Sonoma (14): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Sequoia (15): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Tahoe (26): All 5 tests passed. Html Report (VSDrops) Download

Linux Build Verification

✅ Linux build succeeded

Pipeline on Agent
Hash: f0374966c70ca05fe382bce5c0f88e3c5e7ffd7b [PR build]