[Tests] Add spec tests in FIR + LightTree configuration

In some tests PSI and LT differ. Test data was fixed accordingly.

In the following tests I consider that difference is acceptable:
- compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/3.1.kt
- compiler/tests-spec/testData/diagnostics/linked/expressions/try-expression/p-1/neg/4.1.kt

This is because:
- It only happens when recovering from syntax errors happened above in
code. I was unable to reproduce it in valid code.
- It doesn't break parsing further, the rest of the errors in file are
reported identically.

The rest of the tests will be fixed in subsequent commits.

^KT-62704 Fixed

compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.3.fir.kt

@@ -0,0 +1,77 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
+// SKIP_TXT
+// COMPARE_WITH_LIGHT_TREE
+
+/*
+ * KOTLIN DIAGNOSTICS SPEC TEST (NEGATIVE)
+ *
+ * SPEC VERSION: 0.1-213
+ * MAIN LINK: declarations, classifier-declaration, class-declaration, abstract-classes -> paragraph 2 -> sentence 1
+ * NUMBER: 3
+ * DESCRIPTION: attempt to implement abstract members with invalid types
+ */
+
+// FILE: TestCase1.kt
+// TESTCASE NUMBER: 1
+package testPackCase1
+abstract class Base {
+    abstract val a: CharSequence
+    abstract var b: CharSequence
+
+    abstract fun foo(): CharSequence
+}
+
+class Case1 : Base() {
+    override fun foo(): <!RETURN_TYPE_MISMATCH_ON_OVERRIDE!>Any<!>
+    {
+        return ""
+    }
+
+    override val a: <!PROPERTY_TYPE_MISMATCH_ON_OVERRIDE!>Any?<!>
+    get() = TODO()
+    override var b: <!VAR_TYPE_MISMATCH_ON_OVERRIDE!>String<!>
+    get() = TODO()
+    set(value)
+    {}
+}
+
+// FILE: TestCase2.kt
+// TESTCASE NUMBER: 2
+package testPackCase2
+abstract class Base {
+    abstract val a: CharSequence
+    abstract var b: CharSequence
+
+    abstract fun foo(): CharSequence
+}
+
+class Case2(override val a: String, <!VAR_TYPE_MISMATCH_ON_OVERRIDE{LT}!>override var b: <!VAR_TYPE_MISMATCH_ON_OVERRIDE{PSI}!>String<!><!>) : Base() {
+    override fun foo(): <!RETURN_TYPE_MISMATCH_ON_OVERRIDE!>CharSequence?<!> {
+        return ""
+    }
+}
+
+// FILE: TestCase3.kt
+// TESTCASE NUMBER: 3
+package testPackCase3
+abstract class Base {
+    abstract val a: CharSequence
+    abstract var b: CharSequence
+
+    abstract fun foo(): CharSequence
+}
+
+
+class Case3 {
+    <!ABSTRACT_CLASS_MEMBER_NOT_IMPLEMENTED!>class ImplBase1<!> : MainClass.Base1() {}
+}
+
+class MainClass {
+    abstract class Base1() {
+        abstract val a: CharSequence
+        abstract var b: CharSequence
+
+        abstract fun foo(): CharSequence
+    }
+
+}

compiler/tests-spec/testData/diagnostics/linked/declarations/classifier-declaration/class-declaration/abstract-classes/p-2/neg/1.3.kt

@@ -1,6 +1,6 @@
-// FIR_IDENTICAL
 // !DIAGNOSTICS: -UNUSED_VARIABLE -ASSIGNED_BUT_NEVER_ACCESSED_VARIABLE -UNUSED_VALUE -UNUSED_PARAMETER -UNUSED_EXPRESSION
 // SKIP_TXT
+// COMPARE_WITH_LIGHT_TREE
 
 /*
  * KOTLIN DIAGNOSTICS SPEC TEST (NEGATIVE)