Add LANG to alluxio-env.sh
Add LANG to alluxio-env.sh

### What changes are proposed in this pull request?

Add LANG to `alluxio-env.sh.template`

### Why are the changes needed?

Fix #14724

### Does this PR introduce any user facing changes?

No

pr-link: Alluxio/alluxio#16359
change-id: cid-26d0af019fe57aacca18ebaffbdae60f4da35c9a
wwjiang007/alluxio,wwjiang007/alluxio,Alluxio/alluxio,Alluxio/alluxio,wwjiang007/alluxio,Alluxio/alluxio,Alluxio/alluxio,Alluxio/alluxio,wwjiang007/alluxio,wwjiang007/alluxio,Alluxio/alluxio,wwjiang007/alluxio,wwjiang007/alluxio,Alluxio/alluxio,wwjiang007/alluxio,wwjiang007/alluxio,Alluxio/alluxio,Alluxio/alluxio,Alluxio/alluxio,wwjiang007/alluxio