Bring 25397/8 from trunk:
- remove configure checks for MPI_File_get_size and Big MPI_File_set_size as they are supported by MPIO implementations today.
- fix bug in t_mpi.c (HDFFV-8856)

tested with h5committest.
add serial and parallel regression tests for zero dset read/write bug.
(merged from trunk)
Merge cmake configure checks from trunk