List properties are incorrectly recognized/validated

[fbricon]

In application properties,

quarkus.native.resources.includes=names

is shown with an "unknown property" warning, but it's perfectly valid, as per https://quarkus.io/guides/writing-native-applications-tips#including-resources

We expect an indexed property instead:

initially reported as redhat-developer/intellij-quarkus#1248

See also see https://quarkus.io/guides/config-reference#indexed-properties

Completion should return only quarkus.native.resources.excludes (no trailing [*])