"Suspicious ==/===": do not report when comparison with null is included

So #KT-24001 Fixed

idea/testData/inspections/suspiciousEqualsCombination/inspectionData/expected.xml

@@ -34,4 +34,13 @@
         <problem_class severity="WARNING" attribute_key="WARNING_ATTRIBUTES">Suspicious combination of == and ===</problem_class>
         <description>Suspicious combination of == and ===</description>
     </problem>
+
+    <problem>
+        <file>test.kt</file>
+        <line>18</line>
+        <module>light_idea_test_case</module>
+        <entry_point TYPE="file" FQNAME="test.kt" />
+        <problem_class severity="WARNING" attribute_key="WARNING_ATTRIBUTES">Suspicious combination of == and ===</problem_class>
+        <description>Suspicious combination of == and ===</description>
+    </problem>
 </problems>

idea/testData/inspections/suspiciousEqualsCombination/test.kt

@@ -7,6 +7,15 @@ object Main {
         if (type === CONST1 || type == CONST2 && !(type === CONST3)) return
         if (type === CONST1 || type1 == CONST2 && type === CONST3) return
         if (type === CONST1 || type1 == CONST1 && type === CONST3) return
+
+        val type2: Main? = null
+        if (type2 == null || type === type2) return
+
+        val type3: Main? = null
+        if (type3 === null || type == type3) return
+
+        val type4: Main? = null
+        if (type4 == null || type === type2 || type1 == type) return
     }
 
     val CONST1 = Main;