[SETUPLIB][REACTOS][USETUP] Split FS-volume-specific functionality fr…

…om partitions (reactos#7258)

CORE-13525

This greatly helps in reducing code complexity in some areas: code that
previously iterated over all partitions of a given disk, just to find
which ones were partitioned and contained a valid file system, now just
have to iterate over mounted volumes.
See in particular, lib/utils/osdetect.c and lib/fsutil.c .

- Remove FORMATSTATE "Preformatted" enum value;
- Cleanup osdetect code after introducing Volume support;
- Some simplifications for FormatState.

- Differentiate between 'new' partition and 'new' volume:

  * "New" partition: it has been created and added in the cached list,
    but not yet actually written into the disk.

  * "New" volume: newly-created volume (may be backed by a partition or
    not), not yet formatted. May exist on either new, or not new partition,
    or elsewhere.

base/setup/lib/CMakeLists.txt

@@ -21,6 +21,7 @@ list(APPEND SOURCE
     utils/partinfo.c
     utils/partlist.c
     utils/regutil.c
+    utils/volutil.c
     bootcode.c
     bootsup.c
     fsutil.c