Fix perf test path

Author: NoahStapp

.evergreen/run-perf-tests.sh

@@ -10,11 +10,4 @@ export OUTPUT_FILE="results.json"
 python -m pip install -U pip
 pip install -e .
 
-# Install django and test dependencies
-git clone --branch mongodb-5.2.x https://github.com/mongodb-forks/django django_repo
-pushd django_repo/tests/
-pip install -e ..
-pip install -r requirements/py3.txt
-popd
-
-python run_perf_test.py
+python .evergreen/run_perf_test.py