Firestore Spec Tests: Port JS PR 7229 (optimized query resumption using bloom filter)

[dconeybe]

Port spec test changes from firebase/firebase-js-sdk#7229 (Optimize local cache sync when resuming a query that had docs deleted).

Note that the integer value of QueryPurpose::LimboResolution changed from 2 to 3 in the spec test JSON files as a result of this port and, therefore, some custom logic was added into FSTSpecTests.mm to handle this correctly.

For reference, here is the Android port of the same change: firebase/firebase-android-sdk#4929

#no-changelog

[google-oss-bot]

Coverage Report ¹

Affected Products

• FirebaseFirestore-iOS-FirebaseFirestore.framework

  Overall coverage changed from 88.02% (82f2534) to 88.05% (e2d81f1) by +0.03%.

  Filename	Base (82f2534)	Merge (e2d81f1)	Diff
  exception.cc	23.68%	84.21%	+60.53%
  leveldb_key.cc	98.82%	98.33%	-0.49%
  leveldb_mutation_queue.cc	93.56%	92.42%	-1.14%
  ordered_code.cc	94.39%	93.90%	-0.49%
  serializer.cc	91.41%	91.10%	-0.31%
  watch_stream.cc	95.35%	90.70%	-4.65%

Test Logs

• Base (82f2534): https://github.com/firebase/firebase-ios-sdk/actions/runs/4812069341
• Merge (e2d81f1): https://github.com/firebase/firebase-ios-sdk/actions/runs/4812099929

1. https://storage.googleapis.com/firebase-sdk-metric-reports/MkUP6Rsr0e.html