flux-queue: reopen stdout with errors=surrogateescape encoding

Problem: When non-ascii, utf-8 characters are in output, flux-queue(1)
complains about

 'ascii' codec can't encode character '\u2714' in position 10

Reopen stdout with encoding="utf8", errors="surrogateescape" to avoid
this encoding error.

Author: grondo

src/cmd/flux-queue.py

@@ -429,6 +429,10 @@ def __call__(self, parser, namespace, values, option_string=None):
 
 @flux.util.CLIMain(LOGGER)
 def main():
+    sys.stdout = open(
+        sys.stdout.fileno(), "w", encoding="utf8", errors="surrogateescape"
+    )
+
     parser = argparse.ArgumentParser(prog="flux-queue")
     subparsers = parser.add_subparsers(
         title="subcommands", description="", dest="subcommand"