runtimeVM: Use internal context to ensure goroutines are stopped
runtimeVM: Use internal context to ensure goroutines are stopped

https://github.com/cri-o/cri-o/pull/4803 partially reverted
https://github.com/cri-o/cri-o/pull/4650, but ended up missing two
places where the context is used to ensure the goroutines are stopped.

This was caught due to some tests failing in a non deterministic manner
on kata-containers CI.

Related:
- https://github.com/cri-o/cri-o/issues/4798
- https://github.com/kata-containers/tests/pull/3503#issuecomment-834717567

Signed-off-by: Fabiano Fidêncio <2931bae082ef9bc04523ba759c03a4778316d48f@redhat.com>

kubernetes-incubator/ocid,nalind/cri-o,kubernetes-incubator/ocid,kubernetes-incubator/ocid,nalind/cri-o,nalind/cri-o