Fix: Remove format on read for parse_variables_clamp

[hkershaw-brown]

Description:

Parse_variables_clamp in the default model_mod had format d16.8 in the read statement. This caused integers to be read as value * 10-8 following the fortran standard.
This pull request removes the format on the read for parse_variables_clamp and from the reads in the modules this routine was based off, wrf, mpas_atm, tiegcm

Fixes issue

fixes #1022

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Documentation changes needed?

• My change requires a change to the documentation.
  • I have updated the documentation accordingly.

Tests

Please describe any tests you ran to verify your changes.
Changed the test_parse_args to check integers in the namelist.

Checklist for merging

• Updated changelog entry
• Documentation updated
• Update conf.py

Checklist for release

• Merge into main
• Create release from the main branch with appropriate tag
• Delete feature-branch

Testing Datasets

• Dataset needed for testing available upon request
• Dataset download instructions included
• No dataset needed

[mjs2369]

Hi Helen. This is missing a fix for mpas_ocn:

DART/models/mpas_ocn/model_mod.f90

Lines 3964 to 3976 in e08756e

	bound = trim(bounds_table(2,n))
	if ( bound /= 'NULL' .and. bound /= '' ) then
	read(bound,'(d16.8)') lower_bound
	else
	lower_bound = missing_r8
	endif
	bound = trim(bounds_table(3,n))
	if ( bound /= 'NULL' .and. bound /= '' ) then
	read(bound,'(d16.8)') upper_bound
	else
	upper_bound = missing_r8
	endif

[hkershaw-brown]

Hi Helen. This is missing a fix for mpas_ocn:

DART/models/mpas_ocn/model_mod.f90

Lines 3964 to 3976 in e08756e

	bound = trim(bounds_table(2,n))
	if ( bound /= 'NULL' .and. bound /= '' ) then
	read(bound,'(d16.8)') lower_bound
	else
	lower_bound = missing_r8
	endif
	bound = trim(bounds_table(3,n))
	if ( bound /= 'NULL' .and. bound /= '' ) then
	read(bound,'(d16.8)') upper_bound
	else
	upper_bound = missing_r8
	endif

Good catch, however I have left mpas_ocn alone as it does not compile (no quickbuild.sh).

[mjs2369]

Clean fix