[Spec tests] Add fixed tests for expressions section, fix linkage for reference-equality-expressions section

compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/p-1/neg/2.1.kt

@@ -0,0 +1,26 @@
+// !LANGUAGE: +NewInference
+// !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
+// SKIP_TXT
+
+/*
+ * KOTLIN DIAGNOSTICS SPEC TEST (NEGATIVE)
+ *
+ * SPEC VERSION: 0.1-220
+ * PLACE: expressions, comparison-expressions -> paragraph 1 -> sentence 2
+ * NUMBER: 1
+ * DESCRIPTION: <, >, <= and >=  operators are overloadable
+ */
+
+// TESTCASE NUMBER: 1
+class A(val a: Int)  {
+    fun compareTo(other: A): Int = run {
+        this.a - other.a
+    }
+}
+
+fun case1() {
+    val a3 = A(-1)
+    val a4 = A(-3)
+
+    val x = (a3 <!OPERATOR_MODIFIER_REQUIRED!>><!> a4)
+}

compiler/tests-spec/testData/diagnostics/linked/expressions/comparison-expressions/testsMap.json

@@ -1,4 +1,16 @@
 {
+  "1": {
+    "neg": {
+      "2": [
+        {
+          "specVersion": "0.1-220",
+          "casesNumber": 1,
+          "description": "\u003c, \u003e, \u003c\u003d and \u003e\u003d  operators are overloadable",
+          "unexpectedBehaviour": false
+        }
+      ]
+    }
+  },
   "4": {
     "neg": {
       "1": [