Revert D156363 "[Driver] -###: exit with code 1 if hasErrorOccurred"

This reverts commit e39bf32b.

Some tests have different behaviors depent on whether certain directories/files are present on the host.
An incomplete list from https://lab.llvm.org/buildbot/#/builders/109/builds/70149

csky-toolchain.c
riscv*-toolchain.c
fuchsia.*
hip-*
ohos.c