Add scheduler setting support to tethys link command

[swainn]

Is your feature request related to a problem? Please describe. The tethys link command does not support scheduler settings.

Describe the solution you'd like Support scheduler settings in the tethys link command:

tethys link condor:<condor_scheduler_name> <app_namespace>:ss_scheduler:<scheduler_setting_name>
tethys link dask:<dask_scheduler_name> <app_namespace>:ss_scheduler:<scheduler_setting_name>

Describe alternatives you've considered N/A

Additional context For automated deployment workflows.