Fix false positive ENCLOSING_SUSPEND_FUNCTION_FOR_SUSPEND_FUNCTION_CALL

Previously added additional processing at findEnclosingSuspendFunction
seems unnecessary anymore

^KT-43258 Fixed

compiler/testData/diagnostics/tests/coroutines/suspendInvokeWithReceiver.kt

@@ -0,0 +1,13 @@
+// FIR_IDENTICAL
+// SKIP_TXT
+fun <T> r(x: suspend () -> T): T = null!!
+
+fun nonReproducer1(): String = r {
+    MyObject.someProperty()
+}
+
+object MyObject {
+    val someProperty: String = "TODO()"
+}
+
+suspend operator fun <R> String.invoke(): R = null!!