[e2e] Run all tests without terminating the script on a failure

**Why**: currently when we run the script for executing all e2e tests, they are stopped and script is terminated if a failure is encountered. There are certain occasions that we want to continue them running. For example, on the MV3 job, we want to run all the tests to see all failing tests.

**What**: we'll include an option for running all e2e tests no matter if they fail.

**How**:
- we'll make it the default option for the MV3 run, for now.
- anyone can add this option flag when running their tests locally.