[PM-10137] Update SDK to a6987cf and Xcode to 15.4

[fedemkr]

🎟️ Tracking

PM-10137

📔 Objective

Update SDK reference to a6987cf34e6ec7456f2f55f14b794bdb8ba1f368.

Also for this to happen we need to bump the Xcode version to use to 15.4 which is aligned with the default one in Github actions runner image.

Includes:

• [PM-9527] Add PIN validation support sdk#912
• A dependency upgrade for uniffi. There are minor changes to the bindings such as swift errors now providing localizedDescrption.

Notes:
Updated some snapshots for Xcode 15.4 to the tests pass.

⏰ 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

[KatherineInCode]

🤔 Only thought is that I could see splitting this into two PRs: one for the Xcode update itself, and then another for the SDK update

[github-actions]

Checkmarx One – Scan Summary & Details – 3fa608cc-4b90-4f3f-81c1-eec3f1f203a0

No New Or Fixed Issues Found

[fedemkr]

This will be splitted into two PRs so the Test workflow doesn't fail.