Fix: proper permissions for systemvm template registrations on hardened systems (#12098)

Related to https://github.com/apache/cloudstack/issues/10029#issuecomment-2531599607

We have umask 0077, so cloud-install-sys-tmplt is creating by default paths like below

```
$ ls -l /mnt/secondary/template/tmpl/
total 16
drwx------. 3 root root 4096 Nov 19 13:58 1
drwxrwxrwx. 7 root root 4096 Oct 31 09:42 2
drwxrwxrwx. 3 root root 4096 Oct 30 15:59 4
drwxr-xr-x. 2 root root 4096 Oct 31 10:21 5
$ ls -l /mnt/secondary/template/tmpl/1/
total 4
drwx------. 2 root root 4096 Nov 19 13:59 3
$ ls -l /mnt/secondary/template/tmpl/1/3/
total 549848
-rw-------. 1 root root 563032576 Nov 19 13:59 d23a1e19-c563-4f69-85ca-8721cf02082c.qcow2
-rw-------. 1 root root       287 Nov 19 13:59 template.properties
```

This results to the permissions problems later on, when trying to access the image

Signed-off-by: Artem Sidorenko <artem.sidorenko@telekom.de>

scripts/storage/secondary/cloud-install-sys-tmplt

@@ -44,6 +44,7 @@ failed() {
 }
 
 #set -x
+umask 0022 # ensure we have the proper permissions even on hardened deployments
 mflag=
 fflag=
 ext="vhd"

scripts/storage/secondary/setup-sysvm-tmplt

@@ -19,6 +19,7 @@
 
 # Usage: e.g. failed $? "this is an error"
 set -x
+umask 0022 # ensure we have the proper permissions even on hardened deployments
 
 failed() {
   local returnval=$1