Disable Firestore xcodebuild with tsan (#3628)
Disable Firestore xcodebuild with tsan (#3628)

There's currently a nontrivial TSAN issue with LevelDB that causes these
to fail. Resolution of that issue is tracked as b/139669731. Once that
is resolved, we can revert this change.
firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk,firebase/firebase-ios-sdk