KT-64832 [FIR] Add more testData for invoke on local variables

Covers:
- suspend functional local variables
- overloads
- custom types with invoke operator

compiler/fir/analysis-tests/testData/resolve/extendedCheckers/unused/invokeOverload2.fir.txt

@@ -0,0 +1,13 @@
+FILE: invokeOverload2.kt
+    public final fun foo(): R|kotlin/Unit| {
+        lval x: R|(kotlin/String) -> kotlin/Unit| = fun <anonymous>(s: R|kotlin/String|): R|kotlin/Unit| <inline=Unknown>  {
+        }
+
+        local final fun nested(): R|kotlin/Unit| {
+            lval x: R|(kotlin/Int) -> kotlin/Unit| = fun <anonymous>(i: R|kotlin/Int|): R|kotlin/Unit| <inline=Unknown>  {
+            }
+
+            R|<local>/x|.R|SubstitutionOverride<kotlin/Function1.invoke: R|kotlin/Unit|>|(Int(10))
+        }
+
+    }