Rebase/element ios 1.11.9

[NicolasBuquet]

Fix #1004

Element 1.11.9 is released : https://github.com/element-hq/element-ios/releases/tag/v1.11.9

Changements :

• Update matrix-analytics-events to version 0.15.0 (https://github.com/element-hq/element-ios/pull/7768)
  • travail préparatoire à "Crypto | Add more properties to unable to decrypt Posthog events to allow more filtering"
• Upgrade to build with Xcode 15.2
• Add a privacy manifest
  • mandatory for appStore Submission starting May, 1st, 2024