PYTHON-2271 Add MongoDB 4.0, 4.2, 4.4 to perf benchmark
PYTHON-2271 Add MongoDB 4.0, 4.2, 4.4 to perf benchmark

ShaneHarvey/mongo-python-driver,ShaneHarvey/mongo-python-driver,mongodb/mongo-python-driver,ShaneHarvey/mongo-python-driver,mongodb/mongo-python-driver,mongodb/mongo-python-driver