[BPO] network-manager-openconnect(-gnome)/1.2.8-3 from lunar to jammy

[Impact]

 * Can not connect to VPN of most modern Cisco Servers in Ubuntu Jammy.

[Scope]

 * from Lunar network-manager-openconnect/1.2.8-3 and network-manager-openconnect-gnome/1.2.8-3
 * to Jammy

[Other Info]

 * Openconnect is an alternative to Cisco's Anyconnect. Cisco seems to have changed (undocumented) the rule for connecting to it's VPN servers (see e.g. https://gitlab.com/openconnect/openconnect/-/issues/665).
A user-agent starting with "AnyConnect" ist required to connect which is not the current default value of openconnect.
 * There are two ways to solve the issue:
     a) change the default user agent string in openconnect (as discussed in the above link). This solution might be unstable as Cisco could change the required string again.
     b) enable editing the user agent using network-manager-opencast(-gnome) which works in 1.2.8-3