The `AERO_HISTORY.rc` file that controls the GOCART output is turned
into a template usint `@[ ]` syntax to allow for variable output
times. A new "parsing" script is created for GOCART that handles
parsing the `AERO_HISTORY.rc` file through `atparse`. Other manip-
ulation of these files is also moved to the new parsing script to be
consistent with other components.

A new variable, `FHOUT_AERO` is introduced to control the output
frequency of the GOCART output. This is initially set to 3 to match
other components (this is a change from the current value of 6).
Since some aerosol fields are also included as part of the atmos
output, it may be desirable to meld this back into `FHOUT` later.
However, the atmos output has two frequencies (`FHOUT_HF` and
`FHOUT`), a feature not supported by other components.

The RUN lists for aero fcst, aero analysis, and waves is simplified
to avoid confusion, since there is no need for them to only be set
if the components are on.

Resolves NOAA-EMC#2072

The archive job was using `AERO_ANL_RUN` to determine whether to
archive certain files. With the move to a static declaration of that
instead of only turning it on when aerosols are on, an additional
check is needed.

GOCART output does not start until the first output time after FHMIN,
so the list of output times should reflect that to avoid trying to
copy files that don't exist.

GOCART needs to use the bigger of FHMIN and FHROT when determining
the first output time.

Moves computation of GOCART output times to postdet, since FHROT is
not computed until then.

Makes GOCART output times a function since it is needed in two places.

The defulats file for GEFS was missing an entry for aero to ensure
@field@ get parsed at expt setup time. This was added to gfs as
part of NOAA-EMC#3053, but gefs was missed.