devices/wifi: Use sae as main key-mgmt method for networks supporting WPA2 and WPA3

Piotr Łobacz requested to merge Grishnack/NetworkManager:pl/pr/1136 into main

Networks which are working in hybrid mode - WPA2-PSK/WPA3-SAE are offering two completly different encryption standards. In that case the default mode should be set to "sae". Setting to "wpa-psk" is a downgrade in security and should be only allowed if key-mgmt is set to it.

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