qga-win: Increase VSS freeze timeout to 60 secs instead of 10

qga-win: Increase VSS freeze timeout to 60 secs instead of 10

Currently Requester freeze times out after 10 seconds, while
the default timeout for Writer Freeze is 60 seconds. according to
VSS Documentation [1].
[1]: https://docs.microsoft.com/en-us/windows/win32/vss/overview-of-processing-a-backup-under-vss

Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1909073
Signed-off-by: Basil Salman <bsalman@daynix.com>
Signed-off-by: Basil Salman <basil@daynix.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>