🐛 Do not remount /tmp under alpine (#1530)

Immucore is already mounting /tmp on boot so we should not re-mount it,
or at least if we do, we should check first if its mounted to not shadow
existing /tmp files

Signed-off-by: Itxaka <itxaka.garcia@spectrocloud.com>
Signed-off-by: Mauro Morales <mauro.morales@spectrocloud.com>

overlay/files/system/oem/00_rootfs.yaml

@@ -192,5 +192,4 @@ stages:
     - name: "Mount tmp on alpine"
       if: "[[ $(kairos-agent state get kairos.flavor) =~ ^alpine ]]"
       commands:
-        - mount -o mode=1777,nosuid,nodev -t tmpfs tmpfs /tmp
         - mount --make-rshared /