[CSOptimizer] test: Add test case for issue #85020

Overload resolution picks wrong initializer for some metatype arguments

https://github.com/swiftlang/swift/issues/85020

test/Interpreter/issue-85020.swift

@@ -0,0 +1,33 @@
+// RUN: %target-run-simple-swift | %FileCheck %s
+
+// https://github.com/swiftlang/swift/issues/85020
+
+struct Store {
+  let theType: Any.Type
+
+  init(of theType: Any.Type) {
+    print("init from TYPE: \(theType)")
+    self.theType = theType
+  }
+
+  init(of instance: Any) {
+    print("init from VALUE: \(instance)")
+    self.init(of: type(of: instance))
+  }
+}
+
+let a: (any Numeric)? = 42
+print("a: \(type(of: a))")
+// CHECK: a: Optional<Numeric>
+
+let storeA = Store(of: a!)
+// CHECK-NEXT: init from VALUE: 42
+// CHECK-NEXT: init from TYPE: Int
+
+let b: (any Numeric.Type)? = type(of: 42)
+print("b: \(type(of: b))")
+// CHECK-NEXT: b: Optional<Numeric.Type>
+
+let storeB = Store(of: b!)
+// CHECK-NEXT: init from TYPE: Int
+