redhat: automotive: remove tech preview message

Scott Weaverrequested to merge
scweaver/centos-stream-10:config_automotive into main

JIRA: https://issues.redhat.com/browse/RHEL-77268
Upstream Status: RHEL only

This introduces a Red Hat only config used to define code that differs
from RHEL when building the automotive kernel. This new config is then
used to remove the tech preview warning message for real-time kernels
in the automotive kernel.

Depends: !287 (merged)

Signed-off-by: Scott Weaver scweaver@redhat.com

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