On Windows, howl tests may take a very long time

[eelstork]

Tests will run very slowly, with a complete run taking 40 minutes in one instance and (consistent) apparently "hanging"
Appears related to output redirection (same was observed on macOS, Linux before I turned off output redirection).

Same result with howl test . and dotnet test.
Tests that do not invoke dotnet are probably not affected.
Not observed in CI, perhaps a side effect of calling tests via gitbash?

[eelstork]

Practical solutions here:

• Add a flag to disable output redirection (will stifle dotnet output when running howl test . but not dotnet test)
• Fix output redirection, if that is the root of the issue, and can be done.
• Isolate related tests