Add OracleDatabase/23.2.0-Free project

[PaulNeumann]

Adds an OracleDatabase/23.2.0-Free project, based on the OracleDatabase/21.3.0-XE project.

Notable changes from the 21.3.0-XE project:

• This release doesn't use a read-only Oracle home, so the tnsnames.ora file is under /opt/oracle/product..., rather than /opt/oracle/homes...
• This release doesn't include EM Express, so related code has been removed

Tested with both VirtualBox and libvirt/KVM. Closes #478.

I'm happy to make any changes that you'd like.

Signed-off-by: Paul Neumann [38871902+PaulNeumann@users.noreply.github.com](mailto:38871902+PaulNeumann@users.noreply.github.com)

[gvenzl]

Thanks so much for your contribution, @PaulNeumann!