feat: add preserve_security_group_id support @oycyc (#161)
## What * Added support for `preserve_security_group_id` variable from the cloudposse/security-group moduleWhy
There are many times where we'd like to preserve the existing security group and update in place, rather than create a new SG and have the rules there.
Default is false, which is the existing behaviors of the module. Does NOT have any diff in any previous code upgrading versions.