Unifying the use of MACROs and APIs in pdc_malloc.h all over the project

[zhangwei217245]

In pdc_malloc.h, we provided both APIs and MACROs for memory allocation, but it seems that MACROs are not necessary.

We need to take some time to evaluate whether we should take only APIs or only MACROs when it is in use. Once decided, we need to unify the use of them either in APIs or MACROs, throughout the project.

[jeanbez]

Let's switch to using the PDC malloc ones instead of the macros and directly calling malloc.

[jeanbez]

https://github.com/hpc-io/pdc/blob/stable/src/commons/utils/include/pdc_malloc.h

[jeanbez]

@hyunjuooh have you opened the new PR with this fix?

[hyunjuooh]

I have opened the new PR today. Thank you for the notification.