Fix NPE caused by nullability checks optimizations

Mostly this commit replaces instances of original BasicValue from ASM
with ones of StrictBasicValue having strict equals implementation

Optimization issue was related to non-symmetric 'equals':
- NotNullBasicValue("java/lang/Object").equals(BasicValue("java/lang/Object")) == false
- BasicValue("java/lang/Object").equals(NotNullBasicValue("java/lang/Object")) == true

 #KT-14242 Fixed

compiler/testData/codegen/box/regressions/hashCodeNPE.kt

@@ -0,0 +1,13 @@
+// See KT-14242
+var x = 1
+fun box(): String {
+    val any: Any? = when (1) {
+        x -> null
+        else -> Any()
+    }
+
+    // Must not be NPE here
+    val hashCode = any?.hashCode()
+
+    return hashCode?.toString() ?: "OK"
+}