Replaced pointers with allocatables in mpp modules

[ganganoaa]

Description

• Replaced pointers, which were allocated, with allocatables. The following pointers are affected:

1. overPtr in mpp/include/mpp_do_update_nest.fh:MPP_DO_UPDATE_NEST_FINE_3D_()
2. check_T in mpp/include/mpp_domains_define.inc:mpp_define_domains2D()
3. update, check, overlapList, and checkList in mpp/include/mpp_domains_define.inc:compute_overlaps()
4. overlapList and checkList in mpp/include/mpp_domains_define.inc:compute_overlaps_fold_south()
5. overlapList and newlist in mpp/include/mpp_domains_define.inc: expand_update_overlap_list() and expand_check_overlap_list()
6. search_update_overlap, update_ref, and check in mpp/include/mpp_domains_util.inc: search_update_overlap()
7. overPtr, update_s, update_x, and update_y in mpp/include/mpp_domains_util.inc: set_group_update()
8. update, and check in mpp/include/mpp_update_domains2D.fh:MPP_UPDATE_DOMAINS_3D_()
9. updatex, updatey, checkx, and checky in mpp/include/mpp_update_domains2D.fh:MPP_UPDATE_DOMAINS_3D_V_()
10. update in mpp/include/mpp_update_domains2D_ad.fh:MPP_UPDATE_DOMAINS_AD_3D_()
11. updatex, and updatey in mpp/include/mpp_update_domains2D_ad.fh:MPP_UPDATE_DOMAINS_AD_3D_V_()
12. update in mpp/include/mpp_update_domains2D_nonblock.fh:MPP_START_UPDATE_DOMAINS_3D_() and MPP_COMPLETE_UPDATE_DOMAINS_3D_()
13. updatex, and updaty in mpp/include/mpp_update_domains2D_nonblock.fh:MPP_START_UPDATE_DOMAINS_3D_V_() and MPP_COMPLETE_UPDATE_DOMAINS_3D_V_()
14. Members list, and events of type communicater in mpp/mpp.F90
15. Members of type unstruct_overlap_type: i and j in mpp/mpp_domains.F90
16. Members of type unstruct_pass_type: recv and send in mpp/mpp_domains.F90
17. Members of type domainUG: list, io_domain, and grid_index in mpp/mpp_domains.F90
18. Members of type domain2D_spec: x, y, and tile_id in mpp/mpp_domains.F90
19. Members of type overlap_type: msgsize, tileMe, tileNbr, is, ie, js, je, dir, rotation, index, and from_contact in mpp/mpp_domains.F90
20. Members of type overlapSpec: send, recv, and next in mpp/mpp_domains.F90
21. Members of type domain2D: pearray, tile_id, tile_id_all, x, y, list, tileList, check_C, check_E, check_N, bound_C, bound_E, bound_N, update_T, update_E, update_C, update_N, and io_domain in mpp/mpp_domains.F90
22. Members of type contact_type: tile, align2, refine1, refine2, is1, ie1, js1, je1, is2, ie2_, js2, and je2 in mpp/mpp_domains.F90
23. Members of type nestSpec: send, recv, and next in mpp/mpp_domains.F90
24. Members of type nest_domain_type: nest_level, nest, tile_fine, tile_coarse, istart_fine, iend_fine, jstart_fine, jend_fine, istart_coarse, iend_coarse, jstart_coarse, and jend_coarse in mpp/mpp_domains.F90
25. Members of type nest_level_type: my_nest_id, tile_fine, tile_coarse, istart_fine, iend_fine, jstart_fine, jend_fine, istart_coarse, iend_coarse, jstart_coarse, jend_coarse, pelist, pelist_fine, pelist_coarse, C2F_T, C2F_C, C2F_E, C2F_N, F2C_T, F2C_C, F2C_E, F2C_N, domain_fine, domain_coarse in mpp/mpp_domains.F90
26. Member of type domain1D: list in mpp/mpp_domains.F90

• Attribute target added to several input arguments to functions/subroutines where pointees are no longer pointers.

Fixes #1099

How Has This Been Tested?
Tested locally with Intel oneAPI (v2023.1.0); intel ifort (v2021.9.0). Some tests failed

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules
• New check tests, if applicable, are included
• make distcheck passes

[bensonr]

@ganganoaa - I don't believe we want to change how this code works as these pointers are serving their intended purpose here. The ones we wanted to clean-up were those defined with a macro _ALLOCATED and a corresponding _NULL.