`go run` builds a manifest-less .exe, so Windows applies installer-
detection heuristics and requests admin privileges to programs that
contains "install", "setup", or "update". Rename to dodge that.
Updates #20133
Change-Id: I144d3fcb076d7a02e4a3eb9fd079ee022a035c76
Signed-off-by: Fernando Serboncini <fserb@tailscale.com>