Dilithium 3.1 update, partially autogenerating docs

[bhess]

Updates to Dilithium 3.1 (randomized): #900

Autogenerating docs in docs/algorithms for copy_from_upstream: #893
The following data is autogenerated.

• Parameter sets (name, security model, NIST level, pk size, sk size, sig/ct/ss lengths)
• Implementation version
• Optimization flags used

For consistency reasons, the other data still needs to be updated manually (e.g. source of implementation, license, authors, constant-time ..). I suggest to automate these parts when implementing #892

• Does this PR change the input/output behaviour of a cryptographic algorithm (i.e., does it change known answer test values)? (If so, a version bump will be required from x.y.z to x.(y+1).0.)
• Does this PR change the the list of algorithms available -- either adding, removing, or renaming? (If so, PRs in OQS-OpenSSL, OQS-BoringSSL, and OQS-OpenSSH will also be required by the time this is merged.)