runtime: persistent TestDetectFinalizerAndCleanupLeaks timeout on asan builders

[mknyszek]

#!watchflakes
default <- pkg == "runtime" && test == "TestDetectFinalizerAndCleanupLeaks"

For example: https://ci.chromium.org/ui/p/golang/builders/ci/gotip-linux-amd64-asan-clang15/b8714200629053008897/test-results?q=ExactID%3Aruntime.TestDetectFinalizerAndCleanupLeaks+VHash%3Ad9fa498b8aed33e9&sortby=&groupby=

[gopherbot]

Change https://go.dev/cl/675395 mentions this issue: runtime: don't spin looking for a tiny alloc address with asan or race