JVM IR: support suspend inline functions in -Xmultifile-parts-inherit mode

Support in the normal (without -Xmultifile-parts-inherit) mode is a bit
more complicated, see the added test.

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

@@ -0,0 +1,42 @@
+// WITH_RUNTIME
+// WITH_COROUTINES
+// COMMON_COROUTINES_TEST
+// IGNORE_LIGHT_ANALYSIS
+// !INHERIT_MULTIFILE_PARTS
+// TARGET_BACKEND: JVM
+
+// FILE: test.kt
+
+@file:JvmMultifileClass
+@file:JvmName("Test")
+
+package test
+
+import helpers.*
+import COROUTINES_PACKAGE.*
+import COROUTINES_PACKAGE.intrinsics.*
+
+suspend fun foo(): String = bar("OK")
+
+suspend inline fun bar(result: String): String = suspendCoroutineUninterceptedOrReturn { x ->
+    x.resume(result)
+    COROUTINE_SUSPENDED
+}
+
+fun builder(c: suspend () -> Unit) {
+    c.startCoroutine(EmptyContinuation)
+}
+
+fun test(): String {
+    var result = ""
+
+    builder {
+        result = foo()
+    }
+
+    return result
+}
+
+// FILE: box.kt
+
+fun box(): String = test.test()

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

@@ -0,0 +1,44 @@
+// WITH_RUNTIME
+// WITH_COROUTINES
+// COMMON_COROUTINES_TEST
+// TARGET_BACKEND: JVM
+
+// IGNORE_BACKEND: JVM_IR
+// When -Xmultifile-parts-inherit is disabled, JVM IR backend generates "bridges" that delegate into part members and puts them into
+// the multifile facade. But since the multifile facade phase happens after coroutines, continuations are not created for suspend functions.
+
+// FILE: test.kt
+
+@file:JvmMultifileClass
+@file:JvmName("Test")
+
+package test
+
+import helpers.*
+import COROUTINES_PACKAGE.*
+import COROUTINES_PACKAGE.intrinsics.*
+
+suspend fun foo(): String = bar("OK")
+
+suspend inline fun bar(result: String): String = suspendCoroutineUninterceptedOrReturn { x ->
+    x.resume(result)
+    COROUTINE_SUSPENDED
+}
+
+fun builder(c: suspend () -> Unit) {
+    c.startCoroutine(EmptyContinuation)
+}
+
+fun test(): String {
+    var result = ""
+
+    builder {
+        result = foo()
+    }
+
+    return result
+}
+
+// FILE: box.kt
+
+fun box(): String = test.test()