ctdb: Fix redefinitoin of pmdaResult

ctdb: Fix redefinitoin of pmdaResult

../../ctdb/utils/pmda/pmda_ctdb.c:52:9: warning: 'pmdaResult' redefined
   52 | #define pmdaResult pmResult
      |         ^~~~~~~~~~
In file included from ../../ctdb/utils/pmda/pmda_ctdb.c:35:
/usr/include/pcp/pmda.h:30:9: note: this is the location of the previous definition
   30 | #define pmdaResult pmResult_v2
      |         ^~~~~~~~~~

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15904

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Sat Sep 13 08:12:42 UTC 2025 on atb-devel-224