[FIR] Properly calculate visibilities

`testIntersectionOfPrimitiveBasedFunctions`
is fine, because we deprecate this
already in ^KT-63243.

`CANNOT_INFER_VISIBILITY` is
positioned as `DECLARATION_NAME`,
just in case we decide for
some reason that we do want to
report it along with
`MANY_*_NOT_IMPLEMENTED`. In that
case, we'd get a problem that
their bounds overlap, but not
completely contain one another.

^KT-63741 Fixed
^KT-59400 Fixed

compiler/testData/diagnostics/tests/phantomIntersections.kt

@@ -0,0 +1,14 @@
+// FIR_IDENTICAL
+// ISSUE: KT-63741
+
+interface AreaInstance {
+    fun getExtensionArea(): Int
+}
+
+interface ComponentManager : AreaInstance {
+    override fun getExtensionArea() = 10
+}
+
+interface Project : ComponentManager, AreaInstance
+
+class MockProject : ComponentManager, Project