[FE] Erase type parameters of super types during intersection type emptiness check as well

compiler/testData/codegen/box/coroutines/suspendConversion/intersectionTypeToSubtypeConversion.kt

@@ -0,0 +1,41 @@
+// !LANGUAGE: +SuspendConversion
+// WITH_STDLIB
+// WITH_COROUTINES
+// IGNORE_BACKEND: JVM, NATIVE, JS, JS_IR
+// IGNORE_BACKEND: JS_IR_ES6
+// IGNORE_LIGHT_ANALYSIS
+// IGNORE_BACKEND: WASM
+// WASM_MUTE_REASON: IGNORED_IN_JS
+
+import helpers.*
+import kotlin.coroutines.*
+import kotlin.coroutines.intrinsics.*
+
+fun builder(c: suspend () -> Unit) {
+    c.startCoroutine(EmptyContinuation)
+}
+
+suspend fun useSuspendFun(fn : suspend () -> String) = fn()
+suspend fun useSuspendFunInt(fn: suspend (Int) -> String) = fn(42)
+
+suspend fun <T> testIntersection(x: T): String where T : () -> String, T : (Int) -> String {
+    val a = useSuspendFun(x)
+    val b = useSuspendFunInt(x)
+    return a + b
+}
+
+class Test : () -> String, (Int) -> String {
+    override fun invoke(): String = "OKEmpty"
+    override fun invoke(p: Int) = "OK$p"
+}
+
+fun box(): String {
+    var test = "Failed"
+    builder {
+        test = testIntersection(Test())
+    }
+
+    if (test != "OKEmptyOK42") return "failed: $test"
+
+    return "OK"
+}