Regenerate test data with constructed descriptors for diagnostics tests

compiler/testData/diagnostics/tests/controlFlowAnalysis/kt1066.txt

@@ -0,0 +1,7 @@
+package
+
+package kt1066 {
+    internal fun foo(/*0*/ excluded: kotlin.Set<kotlin.Char>): kotlin.Unit
+    internal fun randomDigit(): kotlin.Char
+    internal fun test(): kotlin.Unit
+}