Relax component property validations for .brs files

[TwitchBronBron]

For plain brightscript projects, we cannot show "can't find that property" errors on objects because these projects should not be forced to define brighterscript interfaces to exclude the errors. This is similar to how javascript handles things where in .js, objects can just flow and morph, but in .ts files they are very strict about the validations.

Here's an example. In .bs, the 3rd line should be an error. in .brs files, it should not be.

contentNode = CreateObject("RoSGNode", "ContentNode")
contentNode.addField("seasonIndex", "integer", false)
contentNode.seasonIndex = data.seasonIndex