test: make the vm timeout escape tests more lenient

Previously the tests required that Node.js finish the initialization
of the watchdog thread and fires the timeout within 100ms, which
can be difficult on certain systems under load. This patch
relaxes the requirement to 2000ms. If there is a bug and the
timeout can actually be escaped, raising the timeout to 2000ms
would not make a difference anyway.

PR-URL: #44433
Refs: nodejs/reliability#333
Refs: nodejs/reliability#361
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>

Author: joyeecheung

test/parallel/test-vm-timeout-escape-promise-2.js

@@ -16,7 +16,7 @@ function loop() {
   while (1) {
     const current = hrtime();
     const span = (current - start) / NS_PER_MS;
-    if (span >= 100n) {
+    if (span >= 2000n) {
       throw new Error(
         `escaped timeout at ${span} milliseconds!`);
     }

test/parallel/test-vm-timeout-escape-promise-module.js

@@ -18,7 +18,7 @@ function loop() {
   while (1) {
     const current = hrtime();
     const span = (current - start) / NS_PER_MS;
-    if (span >= 100n) {
+    if (span >= 2000n) {
       throw new Error(
         `escaped timeout at ${span} milliseconds!`);
     }

test/parallel/test-vm-timeout-escape-promise.js

@@ -17,7 +17,7 @@ function loop() {
   while (1) {
     const current = hrtime();
     const span = (current - start) / NS_PER_MS;
-    if (span >= 100n) {
+    if (span >= 2000n) {
       throw new Error(
         `escaped timeout at ${span} milliseconds!`);
     }