fix(minecraft-fabric): avoid unset CREDENTIALS_DIRECTORY in ExecStop r/8819

For mystifying reasons, Type=simple and CREDENTIALS_DIRECTORY in
ExecStop have stopped working (when exactly I don't know, but presumably
256). Apparently, you are supposed to use Type=exec with credentials due
to raciness (I've personally never experienced):
<https://github.com/systemd/systemd/issues/32583>.

Just changing the type did not resolve the issue of
CREDENTIALS_DIRECTORY being unset, though. It appears, though, that the
issue is merely an unset environment variable and not the credentials
being unavailable: We can work around the problem by setting an
appropriate environment variable ourselves.

Change-Id: Ifcdb1f3bce782ea1c568a9bc413f3fb29f0985c5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12649
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Autosubmit: sterni <sternenseemann@systemli.org>

0 files changed, 0 insertions, 0 deletions