test: skip memory usage tests when ASAN is enabled

Running tests with an ASAN build leads to increased memory usage,
rendering the memory usage assumptions in the test invalid.

Refs: https://github.com/nodejs/node/pull/32776#issuecomment-620407014

PR-URL: https://github.com/nodejs/node/pull/33129


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Matheus Marchini <mat@mmarchini.me>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>