debian/rpm: Adjust build and runtime dependencies and directory ownership

debian/rpm: Adjust build and runtime dependencies and directory ownership

Remove tpm-tools from runtime dependencies. Keep trousers for the
creation of the 'tss' user for now. Add python related dependencies.

Adjust the directory ownership for /var/lib/swtpm-localca to tss:root and
the mode flags to 0750. The new CA now may still be created as tss:tss but
users in the tss group will not have access to it.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>