Make fates_paramfile appear on input data list

[mvdebolskiy]

Description of changes

Fix fates_paramfile not getting on input_data_list and not being checked for existance during case submission.

Specific notes

Moved some calls in main of CLMBuildNamelist.pm and got rid of passing landroot through command line. It is also renamed to lndroot.

Contributors other than yourself, if any:

• @samsrabin (found the bug)

CTSM issues resolved or otherwise addressed, if any:

• (Replace this text, including GitHub issue #, and add more list items as needed)

Testing planned or performed, if any:

• aux_clm on derecho (only namelist comparison with b4bdev)

Checked if fates_paramfile is in ctsm.input_data_list in a I2000Clm50Fates case.

Requirements before merge:

• I have followed the CTSM contribution guidelines.

• The code in this PR branch builds with no errors.
• The code in this PR branch runs with no errors. N/A
• This either (a) does not change answers

• I have reviewed relevant parts of the CLM documentation Tech Note or User's Guide to determine if anything needs to be changed or added. If it does, describe:
• This PR either (a) does not create a need to update the documentation.

[mvdebolskiy]

The reasoning for removing the cmdl option is that the command is already extreamly crowded with them. Also, land component is refered everywhere as lnd, hence renaming the attribute value.

[wwieder]

Thanks for opening this PR, @mvdebolskiy. This will be a nice enhancement for FATES runs.