[rom_e2e] Revisit the "realtime" timeout for the `rom_e2e_...` tests

### Description

All realtime timeout are fairly high (240min & higher). Do we really need timeout which run this long? If one test breaks and somehow don't trigger the simulation timeout the test will run unnecessary long.

Start by locating the realtime timeout configuration used by the rom_e2e tests and reviewing how it relates to the simulation timeout. Determine whether the current 240-minute-or-longer values are necessary, then verify that the selected timeout still allows valid tests to complete while stopping a stalled test sooner.

Written by the indexing model from the issue text.