turbo

3bca6e84 - Decrease default scope_stress test size, add env var config (#8546)

Decrease default scope_stress test size, add env var config (#8546) ### Description I've noticed this test often times out on CI (after >10 minutes!), possibly because it runs out of ram and starts swapping. This decreases the size significantly (this is `O(n^2)`). Locally the test now runs in about 1-2 seconds on my local machine (versus >30 seconds). ### Testing Instructions ``` cargo test -p turbo-tasks-memory rectangle_stress ``` ``` TURBOPACK_TEST_RECTANGLE_STRESS_SIZE=100 cargo test -p turbo-tasks-memory rectangle_stress ```