JVM_IR: generate continuation classes for suspend inline references

This is somewhat suboptimal since this results in `::suspendInline`
generating 2 classes while `{ suspendInline() }` only creates 1, but
it's the best allowed by the existing hierarchy of classes in stdlib. At
least it works?

^KT-50832 Fixed

compiler/testData/codegen/box/coroutines/suspendInlineReference.kt

@@ -0,0 +1,25 @@
+// WITH_STDLIB
+// WITH_COROUTINES
+// IGNORE_BACKEND: JVM, JS
+import helpers.*
+import kotlin.coroutines.*
+import kotlin.coroutines.intrinsics.*
+
+suspend fun suspendHere() = suspendCoroutineUninterceptedOrReturn {
+    it.resume(Unit)
+    COROUTINE_SUSPENDED
+}
+
+suspend inline fun foo(): String {
+    suspendHere()
+    return "OK"
+}
+
+fun box(): String {
+    var result = ""
+    suspend {
+        val ref = ::foo
+        result = ref()
+    }.startCoroutine(EmptyContinuation)
+    return result
+}