test: skip unstable shadow realm gc tests

PR-URL: #52855
Refs: #52273
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>

Author: legendecas

test/parallel/parallel.status

@@ -7,8 +7,9 @@ prefix parallel
 [true] # This section applies to all platforms
 # https://github.com/nodejs/node/issues/52273
 test-net-write-fully-async-hex-string: PASS, FLAKY
-test-shadow-realm-gc: PASS, FLAKY
-test-shadow-realm-gc-module: PASS, FLAKY
+# https://github.com/nodejs/node/issues/52273
+test-shadow-realm-gc: SKIP
+test-shadow-realm-gc-module: SKIP
 # https://github.com/nodejs/node/issues/52274
 test-worker-arraybuffer-zerofill: PASS, FLAKY