wsl2 driver shouldn't require a WSL2 instance to preexist

[AkihiroSuda]

lima/.github/workflows/test.yml

Lines 89 to 100 in 7493e1d

	- name: Install WSL2 distro
	timeout-minutes: 3
	run: |
	# FIXME: At least one distro has to be installed here,
	# otherwise `wsl --list --verbose` (called from Lima) fails:
	# https://github.com/lima-vm/lima/pull/1826#issuecomment-1729993334
	# The distro image itself is not consumed by Lima.
	# ------------------------------------------------------------------
	# Ubuntu-22.04: gets stuck in some infinite loop during adduser
	# OracleLinux_9_1: almostly silently fails, and just prints "Usage: adduser [options] LOGIN"
	wsl --install -d openSUSE-Leap-15.5
	wsl --list --verbose

[AkihiroSuda]

@pendo324 Could you take a look?
wsl --install seems also flaky on the CI, so I want to eliminate it.