tests: replace `hg id --debug -i` command substitution with non-debug command The censor and convert tests were failing on Windows because the `--debug` flag also prints debug messages, and at least some of these were outputting: skip updating dirstate: identity mismatch ${node} Obviously that causes cascading problems. The other tests were OK, but it's better to use a non debug command for stability.

tests: correct Windows output to account for putting repos in `repo` subdir These were missed in 55c6ebd11cb9, due to being conditionalized and not running in CI.

tests: use pattern matching to mask `ECONNREFUSED` messages The second and third one of these in `test-http-proxy.t` was failing on Windows. The others were found by grep and by failed tests when output was matched and an attempt was made to emit the mask pattern. The first clonebundles failure on Windows emitted: error fetching bundle: [WinError 10061] $ECONNREFUSED$ We should probably stringify that better to get rid of the "[WinError 10061]" part.