Update workflow to allow manual runs on different CmdStan versions

[WardBrian]

Submission Checklist

• Run unit tests
• Declare copyright holder and open-source license: see below

Summary

This edits our main workflow to allow you to run it manually and specify a cmdstan version. Hopefully it is useful for things like stan-dev/cmdstan#1061

Copyright and Licensing

Please list the copyright holder for the work you are submitting (this will be you or your assignee, such as a university or company):
Simons Foundation

By submitting this pull request, the copyright holder is agreeing to license the submitted work under the following licenses:

• Code: BSD 3-clause (https://opensource.org/licenses/BSD-3-Clause)

[codecov-commenter]

Codecov Report

Merging #502 (e04e217) into develop (5b80eb8) will decrease coverage by 0.06%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #502      +/-   ##
===========================================
- Coverage    78.88%   78.81%   -0.07%     
===========================================
  Files           30       30              
  Lines         9276     9286      +10     
===========================================
+ Hits          7317     7319       +2     
- Misses        1959     1967       +8     

Impacted Files	Coverage Δ
a/cmdstanpy/cmdstanpy/cmdstanpy/model.py	88.18% <0.00%> (-0.44%)	⬇️
a/cmdstanpy/cmdstanpy/cmdstanpy/utils.py	75.41% <0.00%> (-0.07%)	⬇️
cmdstanpy/cmdstanpy/install_cmdstan.py	32.93% <0.00%> (+0.13%)	⬆️
a/cmdstanpy/cmdstanpy/cmdstanpy/install_cmdstan.py	32.93% <0.00%> (+0.13%)	⬆️
...k/cmdstanpy/cmdstanpy/cmdstanpy/install_cmdstan.py	32.93% <0.00%> (+0.13%)	⬆️
...tanpy/cmdstanpy/cmdstanpy/install_cxx_toolchain.py	26.01% <0.00%> (+0.28%)	⬆️
cmdstanpy/cmdstanpy/install_cxx_toolchain.py	18.49% <0.00%> (+0.36%)	⬆️
...tanpy/cmdstanpy/cmdstanpy/install_cxx_toolchain.py	18.49% <0.00%> (+0.36%)	⬆️

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[serban-nicusor-toptal]

LGTM

[ahartikainen]

What is the point on this change?

Is there a way to manually run GH workflow? Locally/Cloud?

[WardBrian]

You will be able run this by going to the Actions tab on the repo (like how we currently run the Release action). The main motivation is to be able to run the cmdstanpy tests on CmdStan release candidates as part of the release testing cycle. I've also used https://github.com/nektos/act to run actions locally, but our tests are a bit heavy for that with the # of docker instances

[rok-cesnovar]

Is there a way to manually run GH workflow?

Yeah, similar to how its done for release CmdStanPy: