feat: add front end support for WPA Enterprise

[GregoryIvo]

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[marcellorinaldo]

With this configuration:

• Enterprise EAP = any value TLS/TTLS/PEAP
• Inner Authentication = NONE
• Identity = test
• Password = hellotesttest

I get the following stacktrace:

2023-09-14T09:58:09,736 [ConfigurationListener Event Queue] ERROR o.e.k.n.NMDbusConnector - Unable to apply configuration to the device path /org/freedesktop/NetworkManager/Devices/3
java.util.NoSuchElementException: The "net.interface.wlan0.config.802-1x.client-cert" key is missing.
	at org.eclipse.kura.nm.NetworkProperties.get(NetworkProperties.java:41)
	at org.eclipse.kura.nm.configuration.NMSettingsConverter.create8021xTls(NMSettingsConverter.java:169)
	at org.eclipse.kura.nm.configuration.NMSettingsConverter.build8021xSettings(NMSettingsConverter.java:126)
	at org.eclipse.kura.nm.configuration.NMSettingsConverter.buildSettings(NMSettingsConverter.java:97)
	at org.eclipse.kura.nm.NMDbusConnector.enableInterface(NMDbusConnector.java:443)
	at org.eclipse.kura.nm.NMDbusConnector.manageConfiguredInterface(NMDbusConnector.java:422)
	at org.eclipse.kura.nm.NMDbusConnector.doApply(NMDbusConnector.java:381)
	at org.eclipse.kura.nm.NMDbusConnector.lambda$0(NMDbusConnector.java:366)
	at java.util.ArrayList.forEach(ArrayList.java:1259)
	at org.eclipse.kura.nm.NMDbusConnector.doApply(NMDbusConnector.java:363)
	at org.eclipse.kura.nm.NMDbusConnector.apply(NMDbusConnector.java:322)
	at org.eclipse.kura.nm.configuration.NMConfigurationServiceImpl.writeNetworkConfigurationSettings(NMConfigurationServiceImpl.java:317)
	at org.eclipse.kura.nm.configuration.NMConfigurationServiceImpl.update(NMConfigurationServiceImpl.java:218)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.felix.scr.impl.inject.methods.BaseMethod.invokeMethod(BaseMethod.java:228)
	at org.apache.felix.scr.impl.inject.methods.BaseMethod.access$500(BaseMethod.java:41)
	at org.apache.felix.scr.impl.inject.methods.BaseMethod$Resolved.invoke(BaseMethod.java:664)
	at org.apache.felix.scr.impl.inject.methods.BaseMethod.invoke(BaseMethod.java:510)
	at org.apache.felix.scr.impl.inject.methods.ActivateMethod.invoke(ActivateMethod.java:317)
	at org.apache.felix.scr.impl.inject.methods.ActivateMethod.invoke(ActivateMethod.java:307)
	at org.apache.felix.scr.impl.manager.SingleComponentManager.invokeModifiedMethod(SingleComponentManager.java:836)
	at org.apache.felix.scr.impl.manager.SingleComponentManager.modify(SingleComponentManager.java:791)
	at org.apache.felix.scr.impl.manager.SingleComponentManager.reconfigure(SingleComponentManager.java:709)
	at org.apache.felix.scr.impl.manager.SingleComponentManager.reconfigure(SingleComponentManager.java:673)
	at org.apache.felix.scr.impl.manager.ConfigurableComponentHolder.configurationUpdated(ConfigurableComponentHolder.java:435)
	at org.apache.felix.scr.impl.manager.RegionConfigurationSupport.configurationEvent(RegionConfigurationSupport.java:316)
	at org.apache.felix.scr.impl.manager.RegionConfigurationSupport$2.configurationEvent(RegionConfigurationSupport.java:118)
	at org.eclipse.equinox.internal.cm.EventDispatcher$1.run(EventDispatcher.java:92)
	at org.eclipse.equinox.internal.cm.SerializedTaskQueue$1.run(SerializedTaskQueue.java:40)

Maybe such combination is not allowed? If not allowed, we should prevent the user from setting it by disabling some fields.

Setting Inner Authentication to MSCHAPv2 does not cause issues.

[GregoryIvo]

@marcellorinaldo The new commits add the following validation

[GregoryIvo]

I also hid the check button for now: