test: fix flaky inspector-stop-profile-after-done

Use common.platformTimeout() to give longer durations to Raspberry Pi
devices to make test more reliable.

PR-URL: https://github.com/nodejs/node/pull/18126
Fixes: https://github.com/nodejs/node/issues/16772


Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Eugene Ostroukhov <eostroukhov@google.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>