FIR: introduce three diagnostics for const val

compiler/fir/analysis-tests/testData/resolve/constVal/const.kt

@@ -0,0 +1,36 @@
+// FILE: Constants.java
+
+public class Constants {
+    public static final String FIRST = "1st";
+    public static final String SECOND = "2nd";
+}
+
+// FILE: const.kt
+const val a = "something"
+<!MUST_BE_INITIALIZED!><!CONST_VAL_WITHOUT_INITIALIZER!>const<!> val b<!>
+<!TYPE_CANT_BE_USED_FOR_CONST_VAL!>const<!> val c = null
+<!TYPE_CANT_BE_USED_FOR_CONST_VAL!>const<!> val d = ForConst
+const val e = <!CONST_VAL_WITH_NON_CONST_INITIALIZER!>ForConst.one()<!>
+const val f = ((1 + 2) * 3) / 4 % 5 - 1
+const val g = "string $f"
+const val h = "string" + g
+const val i = <!CONST_VAL_WITH_NON_CONST_INITIALIZER!>ForConst.one() + "one"<!>
+const val j = <!CONST_VAL_WITH_NON_CONST_INITIALIZER!>4 * ForConst.two()<!>
+val k = 3 - ForConst.two()
+const val l = <!CONST_VAL_WITH_NON_CONST_INITIALIZER!>k<!>
+
+class ForConst{
+    companion object {
+        fun one(): String = "1"
+        fun two(): Int = 2
+    }
+}
+
+private const val MAJOR_BITS = 3
+private const val MINOR_BITS = 4
+private const val PATCH_BITS = 7
+private const val MAJOR_MASK = (1 shl MAJOR_BITS) - 1 // False positive error
+private const val MINOR_MASK = (1 shl MINOR_BITS) - 1 // False positive error
+private const val PATCH_MASK = (1 shl PATCH_BITS) - 1    // False positive error
+
+private const val stringFromJava = Constants.FIRST + "+" + Constants.SECOND