[Test] Replace three fixed phases of tests with step system

Now each test is just a sequence of any number of different steps. There
  are two kinds of steps:
1. Run some facade
2. Run handlers of specific artifact kind

Through the test each module passed to each step (if it is compatible
  by kinds of artifacts)

idea/idea-frontend-fir/idea-fir-low-level-api/tests/org/jetbrains/kotlin/idea/fir/low/level/api/compiler/based/AbstractCompilerBasedTest.kt

@@ -83,10 +83,9 @@ abstract class AbstractCompilerBasedTest : AbstractKotlinCompilerTest() {
 
         configureTest()
         defaultConfiguration(this)
-        unregisterAllFacades()
+
         useAdditionalService(::TestModuleInfoProvider)
         usePreAnalysisHandlers(::ModuleRegistrarPreAnalysisHandler.bind(disposable))
-        useFrontendFacades(::LowLevelFirFrontendFacade)
     }
 
     open fun TestConfigurationBuilder.configureTest() {}

idea/idea-frontend-fir/idea-fir-low-level-api/tests/org/jetbrains/kotlin/idea/fir/low/level/api/diagnostic/compiler/based/AbstractDiagnosisCompilerTestDataSpecTest.kt

@@ -13,8 +13,8 @@ import org.jetbrains.kotlin.test.runners.baseFirSpecDiagnosticTestConfiguration
 
 abstract class AbstractDiagnosisCompilerTestDataSpecTest : AbstractCompilerBasedTest() {
     override fun TestConfigurationBuilder.configureTest() {
-        baseFirDiagnosticTestConfiguration()
+        baseFirDiagnosticTestConfiguration(frontendFacade = ::LowLevelFirFrontendFacade)
         baseFirSpecDiagnosticTestConfiguration()
         addIdeTestIgnoreHandler()
     }
-}
+}

idea/idea-frontend-fir/idea-fir-low-level-api/tests/org/jetbrains/kotlin/idea/fir/low/level/api/diagnostic/compiler/based/AbstractDiagnosisCompilerTestDataTest.kt

@@ -12,7 +12,7 @@ import org.jetbrains.kotlin.test.runners.baseFirDiagnosticTestConfiguration
 
 abstract class AbstractDiagnosisCompilerTestDataTest : AbstractCompilerBasedTest() {
     override fun TestConfigurationBuilder.configureTest() {
-        baseFirDiagnosticTestConfiguration()
+        baseFirDiagnosticTestConfiguration(frontendFacade = ::LowLevelFirFrontendFacade)
         addIdeTestIgnoreHandler()
     }
-}
+}

idea/idea-frontend-fir/idea-fir-low-level-api/tests/org/jetbrains/kotlin/idea/fir/low/level/api/test/base/AbstractLowLevelApiTest.kt

@@ -24,6 +24,7 @@ import org.jetbrains.kotlin.test.builders.testConfiguration
 import org.jetbrains.kotlin.test.directives.JvmEnvironmentConfigurationDirectives
 import org.jetbrains.kotlin.test.model.DependencyKind
 import org.jetbrains.kotlin.test.model.FrontendKinds
+import org.jetbrains.kotlin.test.model.ResultingArtifact
 import org.jetbrains.kotlin.test.runners.AbstractKotlinCompilerTest
 import org.jetbrains.kotlin.test.services.*
 import org.jetbrains.kotlin.test.services.configuration.CommonEnvironmentConfigurator
@@ -61,6 +62,7 @@ abstract class AbstractLowLevelApiTest : TestWithDisposable() {
         usePreAnalysisHandlers(::ModuleRegistrarPreAnalysisHandler.bind(disposable))
         configureTest(this)
 
+        startingArtifactFactory = { ResultingArtifact.Source() }
         this.testInfo = this@AbstractLowLevelApiTest.testInfo
     }
 
@@ -136,4 +138,4 @@ fun String.indexOfOrNull(substring: String) =
     indexOf(substring).takeIf { it >= 0 }
 
 private fun String.indexOfOrNull(substring: String, startingIndex: Int) =
-    indexOf(substring, startingIndex).takeIf { it >= 0 }
+    indexOf(substring, startingIndex).takeIf { it >= 0 }