[Test] Require specifying parser for FIR test. Unify names for FIR tests

Now all tests with `Fir` in name are named accordingly to parser which
  is used in them -- `FirPsi` or `FirLightTree`. This is needed to keep
  consistency between different types of tests, because there is no
  single default in parser mode between different scenarios of using FIR

compiler/test-infrastructure-utils/tests/org/jetbrains/kotlin/test/FirParser.kt

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.test
+
+enum class FirParser {
+    Psi, LightTree
+}