Refactor: various: Remove U64T(S), U32T, and X32T print/scanf specs

There are custom constants called U64T, X32T, etc. in configure.ac.
They're intended to do the same job as the fixed-width format specifiers
(PRIu64, SCNu64, etc.) that are specified in the C standard. The basic
idea is that the C99 standard doesn't guarantee the existence of
exact-width integer types.

However, Pacemaker already relies on fixed-width types and has for some
time. There's no longer any reason to keep these.

Signed-off-by: Reid Wahl <nrwahl@protonmail.com>