Properties can also be specified in a protocol/overridden by subclasses,
so they should also be classed as "dynamic" in these cases.
Removed receiver USRs when *not* dynamic, since it's not used for
anything in that case and should be equivalent to the container anyway.
Resolves rdar://92882348.
References associated with a `VarDecl` had no `RelationContainedBy` role, resulting in "orphaned" references. From the perspective of identifying unused code (in tools using the index, like [Periphery](https://github.com/peripheryapp/periphery)), this made it impossible to identify that a variable's type, initializer and custom attributes are associated with the variable.
Resolves: [SR-13766](https://bugs.swift.org/browse/SR-13766)
It was hard-coding IsStatic to false rather than passing it through from the
VarDecl, giving the same USR for the two getters in the below:
class FixtureClass95 {
private static var someVar: String!
private var someVar: String!
}
Resolves rdar://problem/44531531
