Merge branch 'singhbalwinder/joverfelt/eamxx/fix-mam4xx-microphysics-NBFB-bug' (PR #6942)

The MAM4xx microphysics standalone test shows NBFB behavior for
two consecutive runs on GPUs. This PR fixes that, and all the fixes are
in the MAM4xx submodule.

This PR also fixes an issue related to the LINOZ file read in the microphysics
interface. The time dimension in the LINOZ file is not unlimited. Adding
a function call to pretend_dim_is_unlimited fixes this issue.

[non-BFB] only for EAMxx

Author: tcclevenger

components/eamxx/src/physics/mam/readfiles/tracer_reader_utils.hpp

@@ -295,6 +295,7 @@ inline void setup_tracer_data(TracerData &tracer_data,             // out
                               const int cyclical_ymd)              // in
 {
   scorpio::register_file(trace_data_file, scorpio::Read);
+  scorpio::pretend_dim_is_unlimited(trace_data_file,"time");
   // by default, I am assuming a zonal file.
   TracerFileType tracer_file_type = ZONAL;
 

components/eamxx/tests/single-process/CMakeLists.txt

@@ -16,19 +16,13 @@ else()
   message(STATUS "RRTMGP and COSP only supported for double precision builds; skipping")
 endif()
 if (SCREAM_ENABLE_MAM)
-  # Once the mam4xx aerosol microphysics AtmosphereProcess is running, the
-  # corresponding test here needs to be reworked with valid aerosol
-  # initial conditions.
   add_subdirectory(mam/optics)
   add_subdirectory(mam/aci)
   add_subdirectory(mam/drydep)
   add_subdirectory(mam/emissions)
   add_subdirectory(mam/constituent_fluxes)
   add_subdirectory(mam/wet_scav)
-
-  # Currently this test produces non-deterministic output.
-  # Commenting it so the other PRs can test normally
-  # add_subdirectory(mam/aero_microphys)
+  add_subdirectory(mam/aero_microphys)
 endif()
 if (SCREAM_TEST_LEVEL GREATER_EQUAL SCREAM_TEST_LEVEL_EXPERIMENTAL)
   add_subdirectory(zm)