Alexander Neundorf authored Oct 14, 2023 and Brad King committed Nov 27, 2023

Previously we issued an error when the `.rpm` suffix is missing.
Instead, append the suffix automatically.  This matches the behavior of
`CPACK_ARCHIVE_FILE_NAME`, to which the archive format suffix is
automatically appended.  With this change, developers can simply do

    set(CPACK_RPM_comp_FILE_NAME "${CPACK_ARCHIVE_comp_FILE_NAME}")