JVM_IR: do not optimize suspend$$forInline functions

`$$forInline` functions do not pass through the state machine generator,
and optimizing `Ref`s before that changes how assignments inside lambdas
passed to `suspendCoroutine`, etc. behave: without a `Ref`, the
assignment is not reflected in the continuation object, so the variable
has old value on resumption.

These functions will be optimized later, after they are inlined
somewhere and the state machine is generated.

^KT-52198 Fixed

compiler/testData/codegen/boxInline/suspend/kt52198.kt

@@ -0,0 +1,40 @@
+// WITH_COROUTINES
+// WITH_STDLIB
+// TARGET_BACKEND: JVM
+// IGNORE_BACKEND_MULTI_MODULE: JVM, JVM_MULTI_MODULE_IR_AGAINST_OLD
+// FILE: lib.kt
+import kotlin.coroutines.*
+import kotlin.coroutines.intrinsics.*
+
+suspend fun foo(value: String): String {
+    var x = "fail"
+    suspendCoroutineUninterceptedOrReturn<Unit> {
+        x = value
+        it.resume(Unit)
+        COROUTINE_SUSPENDED
+    }
+    return x
+}
+
+suspend inline fun fooInline(value: String): String {
+    var x = "fail"
+    suspendCoroutineUninterceptedOrReturn<Unit> {
+        x = value
+        it.resume(Unit)
+        COROUTINE_SUSPENDED
+    }
+    return x
+}
+
+// FILE: main.kt
+import helpers.*
+import kotlin.coroutines.*
+import kotlin.coroutines.intrinsics.*
+
+fun box(): String {
+    var result = ""
+    suspend {
+        result = foo("O") + fooInline("K")
+    }.startCoroutine(EmptyContinuation)
+    return result
+}