test: set test-runner-run-watch as flaky

Author: anonrig

test/parallel/parallel.status

@@ -44,6 +44,8 @@ test-performance-function: PASS, FLAKY
 test-esm-loader-hooks-inspect-wait: PASS, FLAKY
 # https://github.com/nodejs/node/issues/54810
 test-sqlite-statement-sync: PASS, FLAKY
+# https://github.com/nodejs/node/issues/49985
+test-runner-run-watch: PASS, FLAKY
 
 [$system==linux || $system==win32]
 # https://github.com/nodejs/node/issues/49605