test: set test-fs-watch as flaky

Ref: #50249

Author: anonrig

test/parallel/parallel.status

@@ -109,3 +109,5 @@ test-cluster-primary-error: PASS, FLAKY
 [$arch==s390x]
 # https://github.com/nodejs/node/issues/50222
 test-inspector-async-hook-setup-at-inspect-brk: PASS, FLAKY
+# https://github.com/nodejs/node/issues/50249
+test-fs-watch-recursive-add-file-with-url: PASS, FLAKY