This commit adds the necessary packages and env variables necessary in
order to create pre-patched iso using apt-ostree inside inside the
lat container.
Test plan:
PASS: Ran "./stx-init-env --rebuild"
Check if packages are installed
Check if env variable are set and available
Other tests are covered by:
https://review.opendev.org/c/starlingx/root/+/922827
Story: 2010676
Task: 50437
Change-Id: I9d5b6de52ad41525b581dc6956529ae94e7f3f53
Signed-off-by: Dostoievski Batista <dostoievski.albinobatista@windriver.com>