[Tests] Enforce FIR_IDENTICAL for more irText tests

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/runners/codegen/AbstractFirScriptCodegenTest.kt

@@ -63,6 +63,9 @@ open class AbstractFirScriptCodegenTest : AbstractKotlinCompilerWithTargetBacken
                 ::IrTextDumpHandler,
                 ::IrPrettyKotlinDumpHandler,
             )
+            useAfterAnalysisCheckers(
+                ::FirIrDumpIdenticalChecker,
+            )
         }
         facadeStep(::JvmIrBackendFacade)
         jvmArtifactsHandlersStep(init = {})

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/runners/ir/AbstractIrTextTest.kt

@@ -97,6 +97,9 @@ abstract class AbstractIrTextTest<FrontendOutput : ResultingArtifact.FrontendOut
                 ::IrSourceRangesDumpHandler,
                 ::IrMangledNameAndSignatureDumpHandler,
             )
+            useAfterAnalysisCheckers(
+                ::FirIrDumpIdenticalChecker,
+            )
         }
     }