The extra env only contains paths to secrets which are needed to pull
sources. Since the sources don't get pulled on the executor, don't pass
the env along to the executor.
We need the ability to use different CloudWatch group for the
osbuild-executor on Fedora workers in staging and production
environment.
Extend the worker confguration to allow configuring the CloudWatch group
name used by the osbuild-executor. Extend the secure instance code to
instruct cloud-init via user data to create /tmp/cloud_init_vars file
with the CloudWatch group name in the osbuild-executor instance, to make
it possible for the executor to configure its logging differently based
on the value.
Cover new changes by unit tests.
Signed-off-by: Tomáš Hozza <thozza@redhat.com>