chore(*): update Sauce Connect from 4.4.12 to 4.5.1

Sauce Connect 4.5.0 fixes "a major bug in connection state logic that caused
clients to exit prematurely".
See https://wiki.saucelabs.com/display/DOCS/Sauce+Connect+Proxy+Change+Logs
This will possibly improve the stability of our test runs.

Closes #16730