fix: do not suppress git output

[gebner]

This makes it easier to debug cases where git fails. The stderr output also shows progress information during git clone.

See #31 (comment)
Split off from #64

[tydeu]

@gebner Lake now logs Git stdout/stderr on failure. Do you find that sufficient?

[gebner]

It's an improvement, but I'd certainly prefer to get the stderr unfiltered for the live progress report.

[tydeu]

@gebner That just does not seem practical to me. Lake needs to capture the output as it needs to determine how and when to print it based on its own settings. This will, for instance, be important when I improve Lake's logging to have format closer to something like CMake and have flags like --quiet and --verbose to toggle how much logging is performed.

[tydeu]

I am closing this as I think the current logging approach is sufficient for preserving the output for debugging purposes and the live piping approach used here to preserve progress reports is infeasible for the reasons I mentioned above.