Description of Changes

This enables smoketests to run against remote servers, such as maincloud / maincloud staging.

I also added a --spacetime-login param, for servers that require a "proper" spacetime login (such as both servers above).

Usage:

python3 -m smoketests \
  --remote-server https://maincloud.staging.spacetimedb.com \
  --spacetime-login \
  -x replication # for some reason this is required, even though I swear it should be disabled by not passing `--docker`

API and ABI breaking changes

None. CI only.

Expected complexity level and risk

1

Testing

• Smoketests pass on this PR
• Smoketests pass when run against maincloud staging (using the instructions above)
• Manual review to check whether I've accidentally de-fanged any "test for negative case" tests