fix: set RemainAfterExit=yes so resolv-uplink-override.service (#8177)

Author: aadhar-agarwal

parts/linux/cloud-init/artifacts/resolv-uplink-override.service

@@ -5,7 +5,7 @@ After=systemd-networkd.service
 [Service]
 Type=oneshot
 ExecStart=/usr/bin/ln -sf /run/systemd/resolve/resolv.conf /etc/resolv.conf
-RemainAfterExit=no
+RemainAfterExit=yes
 
 [Install]
-RequiredBy=network-online.target kubelet.service
+RequiredBy=network-online.target kubelet.service

vhdbuilder/scripts/linux/tool_installs.sh

@@ -27,7 +27,7 @@ After=systemd-networkd.service
 [Service]
 Type=oneshot
 ExecStart=/usr/bin/ln -sf /run/systemd/resolve/resolv.conf /etc/resolv.conf
-RemainAfterExit=no
+RemainAfterExit=yes
 
 [Install]
 RequiredBy=network-online.target kubelet.service
@@ -76,4 +76,4 @@ getAzCopyCurrentPath() {
 
     echo "get azcopy...done"
   fi
-}
+}