PYTHON-5146 Fix handling of AWS ECS test (#2152)

Author: blink1073

.evergreen/run-mongodb-aws-ecs-test.sh

@@ -31,5 +31,6 @@ export AUTH="auth"
 export SET_XTRACE_ON=1
 cd src
 rm -rf .venv
+rm -f .evergreen/scripts/test-env.sh || true
 bash ./.evergreen/just.sh setup-test
 bash .evergreen/just.sh test-eg

.evergreen/scripts/run-aws-ecs-auth-test.sh

@@ -9,7 +9,4 @@ set -ex
 cd "$DRIVERS_TOOLS"/.evergreen/auth_aws
 . ./activate-authawsvenv.sh
 . aws_setup.sh ecs
-export MONGODB_BINARIES="$MONGODB_BINARIES"
-export PROJECT_DIRECTORY="$PROJECT_DIRECTORY"
-python aws_tester.py ecs
 cd -