[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/tests-compiler-utils/tests/org/jetbrains/kotlin/codegen/GenerationUtils.kt

@@ -45,6 +45,7 @@ import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.resolve.AnalyzingUtils
 import org.jetbrains.kotlin.resolve.BindingTrace
 import org.jetbrains.kotlin.resolve.lazy.JvmResolveUtil
+import org.jetbrains.kotlin.test.FirParser
 import org.jetbrains.kotlin.util.DummyLogger
 import org.jetbrains.kotlin.util.Logger
 import java.io.File
@@ -124,6 +125,7 @@ object GenerationUtils {
             files,
             emptyList(),
             IrGenerationExtension.getInstances(project),
+            FirParser.Psi,
             generateSignatures = false
         )
         val fir2IrExtensions = JvmFir2IrExtensions(configuration, JvmIrDeserializerImpl(), JvmIrMangler)