[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/symbols/symbolByReference/genericFromFunctionInLocalClass.kt

@@ -0,0 +1,14 @@
+// DO_NOT_CHECK_SYMBOL_RESTORE
+package test
+
+class SomeClass
+
+fun <Outer> topLevel() {
+    open class Base {
+        fun withOuter(): Outer? = null
+    }
+
+    class Child : Base() {}
+
+    Child().<caret>withOuter()
+}