Description of problem:
nmcli doesn't accept space in connection.secondaries "VPN connection"

Version-Release number of selected component (if applicable):
NetworkManager-1.42.2-1.el9.x86_64

How reproducible:
always

Steps to Reproduce:
1. nmcli c add con-name base_con ifname eth1 type ethernet connection.autoconnect no
2. nmcli c add con-name 'Open VPN' type vpn ifname '*' vpn-type openvpn
3. nmcli c modify base_con connection.secondaries "Open VPN"

Actual results:
Error: failed to modify connection.secondaries: 'Open' is not a name of any existing profile.

Expected results:
secondary profile of "Open VPN" is added and its UUID is visible in base_con's connection.secondaries

Additional info:
Already covered by NMCI scenario nmcli_space_in_secondaries

Acceptance criteria:

Given a RHEL machine with NetworkManager installed,  

When a user runs the following commands:

• nmcli c add con-name base_con ifname eth1 type ethernet connection.autoconnect no
• nmcli c add con-name 'Open VPN' type vpn ifname '*' vpn-type openvpn
• nmcli c modify base_con connection.secondaries "Open VPN"

Then the system should respond with:

• No errors should be displayed
• The secondary profile of "Open VPN" should be added successfully to base_con's connection.secondaries
• The UUID of the "Open VPN" profile should be visible in base_con's connection.secondaries And the test should pass successfully.