"latest GF and MYNN"

[haiqinli]

GF
1). introduce momentum transport to shallow convection;
2). cloud water detrainment depends on mass detrainment and in-cloud clw/ice
3). make the level with maximum cloud mass flux higher
4). update the diurnal cycle closure

MYNN
1). bug fixes of sub-grid cloud fraction

[climbfuji]

This PR adds new files to the top-level directory of ccpp-physics, instead of updating the existing files in subdirectory physics.

[haiqinli]

I have deleted the files in op-level directory of the ccpp-physics directory, and updated the files in ccpp-physics/physics. Thanks.

[climbfuji]

@haiqinli Thanks very much for updating your PR. I will check out the code, run one or two tests on Theia and on my Mac to make sure that the changes don't break anything.

[climbfuji]

I tested those changes as follows, and they all worked.

• compile CCPP static on MacOSX+GNU, run 24h suite_FV3_GSD test
• run CCPP regression tests on Theia+Intel for all three modes: hybrid, standalone/dynamic, standalone/static

@haiqinli @tanyasmirnova @joeolson42 merging this now