FIR: add property case to companion test

compiler/fir/resolve/testData/resolve/expresssions/companion.kt

@@ -1,6 +1,7 @@
 open class A {
     companion object {
         fun foo() {}
+        val D = ""
     }
 
     fun bar() {
@@ -11,6 +12,7 @@ open class A {
 class B {
     companion object : A() {
         fun baz() {}
+        val C = ""
     }
 }
 
@@ -18,4 +20,7 @@ fun test() {
     A.foo()
     B.bar()
     B.baz()
+    val x = A.D
+    val y = B.C
+    val z = B.D
 }

compiler/fir/resolve/testData/resolve/expresssions/companion.txt

@@ -12,6 +12,9 @@ FILE: companion.kt
             public final fun foo(): R|kotlin/Unit| {
             }
 
+            public final val D: R|kotlin/String| = String()
+                public get(): R|kotlin/String|
+
         }
 
         public final fun bar(): R|kotlin/Unit| {
@@ -32,6 +35,9 @@ FILE: companion.kt
             public final fun baz(): R|kotlin/Unit| {
             }
 
+            public final val C: R|kotlin/String| = String()
+                public get(): R|kotlin/String|
+
         }
 
     }
@@ -39,4 +45,7 @@ FILE: companion.kt
         R|/A|.R|/A.Companion.foo|()
         R|/B|.<Inapplicable(WRONG_RECEIVER): [/A.bar]>#()
         R|/B|.R|/B.Companion.baz|()
+        lval x: R|kotlin/String| = R|/A|.R|/A.Companion.D|
+        lval y: R|kotlin/String| = R|/B|.R|/B.Companion.C|
+        lval z: <ERROR TYPE REF: Unresolved name: D> = R|/B|.<Unresolved name: D>#
     }