Fix pyre related issues in mapillary test code

Summary:
Quality insights reports 1127 missing annotations and 208 pyre-unsafe in the code base with file paths containing "mapillary" and "test".

 What was fixed:

  1. 208 # pyre-unsafe → # pyre-strict directives changed (plus 3 files that had no directive at all)
  2. 1127 missing type annotations added:
    - -> None return types on test methods
    - -> <correct_type> return types on helper functions that return values
    - MagicMock parameter types for patch-decorated method mock params
    - Correct primitive types (str, int, float, bool, etc.) for helper function params with default values
  3. 23 missing MagicMock imports added
  4. All files formatted with arc lint -a

 Remaining pre-existing pyre errors (not introduced by this change):

 These were hidden by # pyre-unsafe and are now visible:
  - synthetic_cluster_dataset.py: Callable generic type needs 2 params (3 errors)
  - test_anonymization_task.py: Cannot reassign final attribute + incompatible param type (2 errors)
  - merge_tests.py: np.ndarray generic type needs 2 params (4 errors)
  - test_fix_vrs_frame_ids.py: patch with lambda not inferrable (5 errors — pre-existing pyre limitation)

Reviewed By: d99m

Differential Revision: D96924234

fbshipit-source-id: 338b2c7dc36cdc06cc71cb9ebe5ee2f2d6d0ece3

Author: caglarpir

opensfm/test/conftest.py

@@ -1,6 +1,7 @@
 # pyre-strict
 from collections import defaultdict
 from typing import Dict, List, Tuple
+from unittest.mock import MagicMock
 
 import numpy as np
 import pytest
@@ -13,7 +14,7 @@
 )
 
 
-def pytest_configure(config) -> None:
+def pytest_configure(config: MagicMock) -> None:
     use_legacy_numpy_printoptions()
 
 
@@ -163,7 +164,7 @@ def pairs_and_poses() -> Tuple[
 
 @pytest.fixture(scope="module")
 def pairs_and_their_E(
-    pairs_and_poses,
+    pairs_and_poses: MagicMock,
 ) -> List[Tuple[NDArray, NDArray, NDArray, pygeometry.Pose]]:
     pairs, poses, camera, _, _, _ = pairs_and_poses
 
@@ -195,7 +196,7 @@ def pairs_and_their_E(
 
 @pytest.fixture(scope="module")
 def shots_and_their_points(
-    pairs_and_poses,
+    pairs_and_poses: MagicMock,
 ) -> List[Tuple[pygeometry.Pose, NDArray, NDArray]]:
     _, _, _, _, tracks_manager, reconstruction = pairs_and_poses