SourceNavigationHelper: fix navigation to callables

Previously we could differentiate between callables with the same name
    when relevant type declaration were in the same file only
Problem manifested most severely when several copies of sources were attached
    to the same library

idea/testData/decompiler/navigation/usercode/TypeWithSameShortName.decompiled.expected

@@ -1,6 +1,6 @@
-Double.class
+ Double.class
 public final class Double public <3>constructor() {
- MainKt.class
+ ExtraKt.class
 public fun <1>processDouble(d: kotlin.Double): kotlin.Unit { /* compiled code */ }
 
 public fun <2>processDouble(d: testData.libraries.Double): kotlin.Unit { /* compiled code */ }

idea/testData/decompiler/navigation/usercode/TypeWithSameShortName.source.expected

@@ -1,6 +1,6 @@
-main.kt
-public class <3>Double
-
+ extra.kt
 public fun <2>processDouble(d: Double) {}
 
 public fun <1>processDouble(d: kotlin.Double) {}
+ main.kt
+public class <3>Double