Fix typechecker when initializer of destructuring declaration is unresolved or missing

compiler/testData/diagnostics/tests/declarationChecks/multiDeclarations/multiDeclarationAssignedUnresolved.kt

@@ -0,0 +1,11 @@
+fun useDeclaredVariables() {
+    val (a, b) = <!UNRESOLVED_REFERENCE!>unresolved<!>
+    <!UNUSED_EXPRESSION, DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>a<!>
+    <!UNUSED_EXPRESSION, DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>b<!>
+}
+
+fun checkersShouldRun() {
+    val (@A <!UNUSED_VARIABLE!>a<!>, <!UNDERSCORE_IS_RESERVED, UNUSED_VARIABLE!>_<!>) = <!UNRESOLVED_REFERENCE!>unresolved<!>
+}
+
+annotation class A

compiler/testData/diagnostics/tests/declarationChecks/multiDeclarations/multiDeclarationAssignedUnresolved.txt

@@ -0,0 +1,11 @@
+package
+
+public fun checkersShouldRun(): kotlin.Unit
+public fun useDeclaredVariables(): kotlin.Unit
+
+public final annotation class A : kotlin.Annotation {
+    public constructor A()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/testData/diagnostics/tests/declarationChecks/multiDeclarations/multiDeclarationMissingInitializer.kt

@@ -0,0 +1,11 @@
+fun useDeclaredVariables() {
+    <!INITIALIZER_REQUIRED_FOR_DESTRUCTURING_DECLARATION!>val (a, b)<!>
+    <!UNUSED_EXPRESSION, DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>a<!>
+    <!UNUSED_EXPRESSION, DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>b<!>
+}
+
+fun checkersShouldRun() {
+    <!INITIALIZER_REQUIRED_FOR_DESTRUCTURING_DECLARATION!>val (@A <!UNUSED_VARIABLE!>a<!>, <!UNDERSCORE_IS_RESERVED, UNUSED_VARIABLE!>_<!>)<!>
+}
+
+annotation class A

compiler/testData/diagnostics/tests/declarationChecks/multiDeclarations/multiDeclarationMissingInitializer.txt

@@ -0,0 +1,11 @@
+package
+
+public fun checkersShouldRun(): kotlin.Unit
+public fun useDeclaredVariables(): kotlin.Unit
+
+public final annotation class A : kotlin.Annotation {
+    public constructor A()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}