feat: remove all remaining legacy analytics native code

[NicolasMassart]

What is this about?

Since migration to new MetaMetrics using segment is done, we can remove all Mixpanel analytics native code and dependencies.

Scenario

No response

Design

No response

Technical Details

Android

• Remove mixpanel native dependencies in android/app/build.gradle
• all native module code in Android related to RCTAnalytics in android/app/src/main/java/io/metamask/nativeModules
• MM_MIXPANEL_TOKEN in .android.env and gradle files

iOS

• Remove mixpanel native dependencies in ios/mixpanel-iphone and ios/Mixpanel.framework
• all native module code in iOS related to RCTAnalytics in ios/MetaMask/NativeModules/RCTAnalytics
• all mixpanel code in ios
• all framework link in ios/MetaMask.xcodeproj
• ios/mixpanel-iphone git submodule
• MM_MIXPANEL_TOKEN in plist files

Common

• all mixpanel properties (search for mixpanel in all the project)
• remove remapping MM_MIXPANEL_TOKEN in scripts/build.sh

Bitrise

• remove mixpanel env vars and secrets -> to be done by Bitrise admin #8845

Threat Modeling Framework

No response

Acceptance Criteria

• no Mixpanel code remaining

Stakeholder review needed before the work gets merged

• Engineering (needed in most cases)
• Design
• Product
• QA (automation tests are required to pass before merging PRs but not all changes are covered by automation tests - please review if QA is needed beyond automation tests)
• Security
• Legal
• Marketing
• Management (please specify)
• Other (please specify)

References

No response

[metamaskbot]

Missing release label release-7.18.0 on issue. Adding release label release-7.18.0 on issue, as issue is linked to PR #8829 which has this release label.