Merge branch 'eamxx/fix_initialization' (PR E3SM-Project#7654)

For a multi-year NetCDF file, we also need to add the time offset
index. This issue was producing NBFB results, as noted in PR E3SM-Project#7638.
    
Without this fix, the model was incorrectly reading the data from
the very first year in a multi-year file. For example, for oxidants
and LINOZ files, the model was incorrectly reading the data from the
year 1850 as its initial time sample (instead of 2015). The second
time sample (as we need two time samples to interpolate linearly) was
correctly picked up from 2015.
    
With this fix, both time samples are now correctly read from the
intended year (2015 in this example), ensuring proper interpolation
and model behavior.
    
[NBFB for EAMxx]

Author: tcclevenger

components/eamxx/src/physics/mam/eamxx_mam_microphysics_process_interface.cpp

@@ -619,10 +619,10 @@ void MAMMicrophysics::initialize_impl(const RunType run_type) {
   const int curr_month = start_of_step_ts().get_month() - 1;  // 0-based
   if (config_.linoz.compute) {
     scream::mam_coupling::update_tracer_data_from_file(
-      LinozDataReader_, curr_month, *LinozHorizInterp_, linoz_data_);
+      LinozDataReader_, curr_month+linoz_data_.offset_time_index_, *LinozHorizInterp_, linoz_data_);
   }
   scream::mam_coupling::update_tracer_data_from_file(
-      TracerDataReader_, curr_month, *TracerHorizInterp_, tracer_data_);
+      TracerDataReader_, curr_month+tracer_data_.offset_time_index_, *TracerHorizInterp_, tracer_data_);
 
   for(int i = 0; i < static_cast<int>(extfrc_lst_.size()); ++i) {
     scream::mam_coupling::update_tracer_data_from_file(