[FIR IDE] Add unwrapping substitution overrides which doesn't affect function's signature

Also, do not use PSI to restore SUBSTITUTION_OVERRIDE function/property
symbols

analysis/analysis-api/testData/scopes/substitutionOverridesUnwrapping/ClassWithGenericBase3.kt

@@ -0,0 +1,20 @@
+package test
+
+class SomeClass1
+class SomeClass2
+
+interface InterfaceWithFunBase<T1, T2> {
+    fun noGenerics_InterfaceWithFunBase() {}
+
+    fun withOuterGenericT1_InterfaceWithFunBase(): T1 {}
+
+    fun withOuterGenericT2_InterfaceWithFunBase(): T2 {}
+}
+
+interface InterfaceWithFun<T> : InterfaceWithFunBase<SomeClass1, T> {
+    fun noGenerics_InterfaceWithFun() {}
+
+    fun withOuterGeneric_InterfaceWithFun(): T {}
+}
+
+abstract class <caret>ClassWithInterfaceWithFun : InterfaceWithFun<SomeClass2>