Modern_diag_manager :: multiple_send_data calls option

[uramirez8707]

Description

• Adds an optional variable (multiple_send_data) to register_diag_field, which if set to .True. it indicates that send_data is called multiple times for the same time
• If that option is set to .True. the data will be buffered
  • If the field's mask changes over time, the input buffer will be updated only when the mask is set to .True. This will be the case for some of the river diagnostics (https://gitlab.gfdl.noaa.gov/uriel.ramirez/land_lad2/-/blob/multiple_send_data_fix/river/river_physics.F90?ref_type=heads#L161-L166)
  • If the field's mask does not change over time , the input_buffer will be added and a counter will be added. Once the code hits diag_send_complete it will divide the field by the number of times send _data is called). This will be the case for some variable in vert_diff_driver (https://gitlab.gfdl.noaa.gov/fms/atmos_phys/-/commit/e1bf0539060a4b1e9b63f0e3fbfaf65f663c6c08)
• Modifies logic so that the time dimension will be written at least once. This is needed so that the combiner works for when doing regression testing.

Fixes # (issue)

How Has This Been Tested? CI AM4 - the river diagnostics and the vert_diff_drivers were changing answers before this update

Checklist:

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

[uramirez8707]

Does this need to have a test added?

A test has been added