[NI] Remove failing codegen tests and add similar diagnostic one

These tests were added for suspend-conversions, it worked only
 with new inference, but implementation was incorrect and had other
 bugs, which were fixed in 1ac25259.
 Support of suspend-conversions will be addressed later with a different
 implementation (#KT-30703)

compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/suspendConversionForCallableReferences.kt

@@ -0,0 +1,17 @@
+// !LANGUAGE: +NewInference
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+inline fun go1(f: () -> String) = f()
+inline suspend fun go2(f: () -> String) = f()
+
+fun builder(c: suspend () -> Unit) {}
+
+suspend fun String.id(): String = this
+
+fun box() {
+    val x = "f"
+    builder {
+        go1(<!TYPE_MISMATCH!>x::id<!>)
+        go2(<!TYPE_MISMATCH!>x::id<!>)
+    }
+}

compiler/testData/diagnostics/testsWithStdLib/coroutines/callableReference/suspendConversionForCallableReferences.txt

@@ -0,0 +1,7 @@
+package
+
+public fun box(): kotlin.Unit
+public fun builder(/*0*/ c: suspend () -> kotlin.Unit): kotlin.Unit
+public inline fun go1(/*0*/ f: () -> kotlin.String): kotlin.String
+public suspend inline fun go2(/*0*/ f: () -> kotlin.String): kotlin.String
+public suspend fun kotlin.String.id(): kotlin.String