Convert GFS DDTs from blocked data structures to contiguous arrays (now also includes https://github.com/NOAA-EMC/fv3atm/pull/752)

[climbfuji]

Description

In fv3atm and submodules, convert internal GFS DDTs from blocked data structures to contiguous arrays. This excludes the (external) GFS_extdiag and GFS_restart DDTs. Also remove the GFS_Data super DDT and use the individual DDTs directly.

This PR also includes the changes from #752 (Add unit testing from @AlexanderRichert-NOAA).

Issue(s) addressed

Working towards ufs-community/ufs-weather-model#2294

Testing

See ufs-community/ufs-weather-model#2183

Dependencies

Associated PRs:

• waiting on Branch dev/emc: convert GFS DDTs from blocked data structures to contiguous arrays NOAA-GFDL/GFDL_atmos_cubed_sphere#330
• waiting on Convert GFS DDTs from blocked data structures to contiguous arrays (aka update GFS_debug.F90) ufs-community/ccpp-physics#183
• this PR Convert GFS DDTs from blocked data structures to contiguous arrays (now also includes https://github.com/NOAA-EMC/fv3atm/pull/752) #798
• downstream PR In fv3atm: convert GFS DDTs from blocked data structures to contiguous arrays ufs-community/ufs-weather-model#2183

[climbfuji]

@climbfuji If it's not too much trouble, can you please merge #752 with this PR. The #752 adds few additional files that support unit testing and as far as I can see they should not have any impact on the changes introduced in this PR. If prefer not to do that, that's perfectly fine, we can merge it separately or combine it with some other PR.

I can do that, no problem - should be able to get this done this morning

[climbfuji]

Done. See note in ufs-w-m PR.

[zach1221]

@DusanJovic-NOAA @BrianCurtis-NOAA are you able to provide a review here?

[grantfirl]

Apologies for merging delay. ufs-community/ccpp-physics#183 has been merged, so this is ready to update. @climbfuji @zach1221

[zach1221]

@climbfuji cubed-sphere 330 is also merged.

[climbfuji]

@jkbk2004 Thanks for reverting .gitmodules and pushing the submodule updates. Is there anything left to do for me?

[jkbk2004]

@climbfuji we will take from here. thanks a lot for all the work!

[jkbk2004]

@DusanJovic-NOAA can you resolve the conversation and merge?