Remove TigerVNC from RHEL 10

As announced in [0] the Xorg server will be removed from RHEL 10 which we will
take as the opportunity to remove TigerVNC from RHEL 10 as well and suggest
to use RDP protocol through GNOME Remote Desktop instead (that relies on
FreeRDP[2] project). As of now Xorg server source files are not planned to be
shipped in RHEL 10 so technically we won't be able to build TigerVNC in RHEL 10
anyway.

With TigerVNC removal the server and client will be removed, but the ability to
connect to other VNC servers (running for example on older RHEL versions) will
remain through GNOME Connections[3] which is already shipped in RHEL 9.

[0] - https://www.redhat.com/en/blog/rhel-10-plans-wayland-and-xorg-server
[1] - https://gitlab.gnome.org/GNOME/gnome-remote-desktop
[2] - https://github.com/FreeRDP/FreeRDP/
[3] - https://gitlab.gnome.org/GNOME/connections/

configs/sst_desktop_applications-tigervnc.yaml

@@ -12,5 +12,4 @@ data:
   - tigervnc-server-module
 
   labels:
-  - eln
   - c9s