[PM-25573] [RC] Update to use Xcode 26

[fedemkr]

🎟️ Tracking

PM-25573

📔 Objective

🍒 Cherry picked from: #1943

Updating our CI to use Xcode 26. Temporarily disabling snapshot tests while keeping the rest of the test suit functional, they'll be re-enabled after snapshots are updated in a future PR.

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[github-actions]

Checkmarx One – Scan Summary & Details – 11ba68b2-34bb-44e9-b112-3349f685ad43

Great job! No new security vulnerabilities introduced in this pull request

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.06%. Comparing base (bfc8742) to head (b38d4e4).
⚠️ Report is 1 commits behind head on release/2025.9-rc28.

Additional details and impacted files

@@                   Coverage Diff                    @@
##           release/2025.9-rc28    #1959       +/-   ##
========================================================
- Coverage                88.67%   70.06%   -18.61%     
========================================================
  Files                      822     1015      +193     
  Lines                    51785    61631     +9846     
========================================================
- Hits                     45921    43183     -2738     
- Misses                    5864    18448    +12584     

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