Generate CHECKCAST after ACONST_NULL in coroutines

If we do not do this, the state-machine builder will not know the type
of the ACONST_NULL, defaulting to Object, leading to VerifyError.
Alternatively, we could use LVT to deduce the type, but getting types
from LVT is something I got rid of long time ago, and I have no desire
to return it back.

Generating CHECKCAST hints the state-machine builder the type of the
variable avoiding the issue of VerifyError. However, this CHECKCAST
replaces StrictBasicValue.NULL_VALUE with BasicValue in
OptimizationBasicInterpreter. To preserve optimization on not-spilling
known nulls, introduce BasicValues, which represent typed nulls and
create BasicInterpreter, which is aware of them. This way we have the
best of two worlds - we do not spill known nulls, and we know the type
of ACONST_NULL.

 #KT-51718 Fixed

compiler/testData/codegen/box/coroutines/kt51718.kt

@@ -0,0 +1,60 @@
+// WITH_STDLIB
+
+import kotlin.coroutines.*
+
+fun builder(c: suspend () -> Unit) {
+    c.startCoroutine(Continuation(EmptyCoroutineContext) {
+        it.getOrThrow()
+    })
+}
+
+class Service {
+    suspend fun getCanalConfig() {
+        var start: Start? = null
+        var configuration: String? = null
+        val starts: Array<Start>? = null
+        if (starts != null && starts.isNotEmpty()) {
+            start = starts[0]
+            configuration = call2()
+        }
+        //start = start as Start // kotlin 1.5.0 need for produce correct bytecode
+        call(start!!)
+    }
+
+    val canalConfig = suspend {
+        var start: Start? = null
+        var configuration: String? = null
+        val starts: Array<Start>? = null
+        if (starts != null && starts.isNotEmpty()) {
+            start = starts[0]
+            configuration = call2()
+        }
+        //start = start as Start // kotlin 1.5.0 need for produce correct bytecode
+        call(start!!)
+    }
+
+    fun call(start: Start) {
+
+    }
+
+    suspend fun call2(
+    ): String? {
+        return null
+    }
+}
+
+class Start()
+
+fun box(): String {
+    builder {
+        try {
+            Service().getCanalConfig()
+            error("FAIL 1")
+        } catch (ignored: NullPointerException) {}
+        try {
+            Service().canalConfig()
+            error("FAIL 2")
+        } catch (ignored: NullPointerException) {}
+    }
+    return "OK"
+}

compiler/testData/codegen/box/coroutines/tailCallOptimizations/crossinline.txt

@@ -4,7 +4,6 @@ public final class CrossinlineKt$box$1$filter$$inlined$source$1$1 {
     // source: 'crossinline.kt'
     enclosing method CrossinlineKt$box$1$filter$$inlined$source$1.consume(LSink;Lkotlin/coroutines/Continuation;)Ljava/lang/Object;
     field L$0: java.lang.Object
-    field L$1: java.lang.Object
     field label: int
     synthetic field result: java.lang.Object
     synthetic final field this$0: CrossinlineKt$box$1$filter$$inlined$source$1
@@ -89,7 +88,6 @@ public final class CrossinlineKt$box$1$invokeSuspend$$inlined$filter$1$1 {
     // source: 'crossinline.kt'
     enclosing method CrossinlineKt$box$1$invokeSuspend$$inlined$filter$1.consume(LSink;Lkotlin/coroutines/Continuation;)Ljava/lang/Object;
     field L$0: java.lang.Object
-    field L$1: java.lang.Object
     field label: int
     synthetic field result: java.lang.Object
     synthetic final field this$0: CrossinlineKt$box$1$invokeSuspend$$inlined$filter$1
@@ -181,7 +179,6 @@ public final class CrossinlineKt$filter$$inlined$source$1$1 {
     // source: 'crossinline.kt'
     enclosing method CrossinlineKt$filter$$inlined$source$1.consume(LSink;Lkotlin/coroutines/Continuation;)Ljava/lang/Object;
     field L$0: java.lang.Object
-    field L$1: java.lang.Object
     field label: int
     synthetic field result: java.lang.Object
     synthetic final field this$0: CrossinlineKt$filter$$inlined$source$1
@@ -282,7 +279,6 @@ public final class CrossinlineKt$range$$inlined$source$1$1 {
     field I$1: int
     field L$0: java.lang.Object
     field L$1: java.lang.Object
-    field L$2: java.lang.Object
     field label: int
     synthetic field result: java.lang.Object
     synthetic final field this$0: CrossinlineKt$range$$inlined$source$1
@@ -310,7 +306,6 @@ public final class CrossinlineKt$source$1$consume$1 {
     // source: 'crossinline.kt'
     enclosing method CrossinlineKt$source$1.consume(LSink;Lkotlin/coroutines/Continuation;)Ljava/lang/Object;
     field L$0: java.lang.Object
-    field L$1: java.lang.Object
     field label: int
     synthetic field result: java.lang.Object
     synthetic final field this$0: CrossinlineKt$source$1

compiler/testData/codegen/bytecodeText/coroutines/cleanup/nullCleanup.kt

@@ -14,10 +14,5 @@ suspend fun test() {
 
 // 2 PUTFIELD .*L\$0 : Ljava/lang/Object;
 
-// JVM_TEMPLATES:
-// just before suspension point
-// 1 ACONST_NULL
-
-// JVM_IR_TEMPLATES:
 // two stores to initialize the `a` variable and one null constant to store in the spill slot.
 // 3 ACONST_NULL