FIR checker: report SUPERTYPE_NOT_INITIALIZED

Combined this and the checker of
SUPERTYPE_INITIALIZED_WITHOUT_PRIMARY_CONSTRUCTOR together.

Also fixed SUPERTYPE_INITIALIZED_WITHOUT_PRIMARY_CONSTRUCTOR incorrectly
repoted as warning instead of error.

compiler/testData/diagnostics/tests/Constructors.fir.kt

@@ -1,11 +1,11 @@
 open class NoC
-class NoC1 : NoC
+class NoC1 : <!SUPERTYPE_NOT_INITIALIZED!>NoC<!>
 
 class WithC0() : NoC()
-open class WithC1() : NoC
-class NoC2 : WithC1
+open class WithC1() : <!SUPERTYPE_NOT_INITIALIZED!>NoC<!>
+class NoC2 : <!SUPERTYPE_NOT_INITIALIZED!>WithC1<!>
 class NoC3 : WithC1()
-class WithC2() : WithC1
+class WithC2() : <!SUPERTYPE_NOT_INITIALIZED!>WithC1<!>
 
 class WithPC0() {
 }
@@ -32,4 +32,4 @@ class NoCPI {
   var ab = <!PROPERTY_INITIALIZER_NO_BACKING_FIELD!>1<!>
     get() = 1
     set(v) {}
-}
+}