Run snow model at all SNOWMIP sites

[kmdeck]

Purpose

Run snow model at all SNOWMIP sites

To-do

[X] Add yearly average plot of SWE and T_sfc, along with data (unaveraged)
[X] Use ClimaArtifacts instead of local version
[X] Update buildkite run
[X] Review

Content

Generalized the snow_cdp.jl script to run the snow model at all SNOWMIP sites, not just Col de Porte. Instead of referring to process_cdp.jl to read in the observed site data, snow_cdp.jl now calls process_snowmip.jl to accomplish this. The snow_cdp.jl script takes an argument for the SNOWMIP site that the model will be run on; if no site is given, cdp is used.

Review checklist

I have:

• followed the codebase contribution guide: https://clima.github.io/ClimateMachine.jl/latest/Contributing/
• followed the style guide: https://clima.github.io/ClimateMachine.jl/latest/DevDocs/CodeStyle/
• followed the documentation policy: https://github.com/CliMA/policies/wiki/Documentation-Policy
• checked that this PR does not duplicate an open PR.

In the Content, I have included

• relevant unit tests, and integration tests,

• appropriate docstrings on all functions, structs, and modules, and included relevant documentation.

• I have read and checked the items on the review checklist.