[MPP] Improve readability of MultiplatformDiagnosticsDirectives

- Improved description as suggested during code review
- Renamed MULTIPLATFORM_COMPOSITE_ANALYSIS_MODE du *_ENABLED

^KT-50120

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/directives/MultiplatformDiagnosticsDirectives.kt

@@ -9,10 +9,11 @@ import org.jetbrains.kotlin.test.directives.model.DirectiveApplicability
 import org.jetbrains.kotlin.test.directives.model.SimpleDirectivesContainer
 
 object MultiplatformDiagnosticsDirectives : SimpleDirectivesContainer() {
-    val MULTIPLATFORM_COMPOSITE_ANALYSIS_MODE by directive(
+    val MULTIPLATFORM_COMPOSITE_ANALYSIS_MODE_ENABLED by directive(
         description = """
-            Will setup the classical frontend similar to 'CLI metadata compilation' or 'IDE analysis' where dependsOn sources
+            If present, sets up the classical frontend in a way, similar to how analysis works in IDE, when dependsOn sources are located 
-            are located in separate module descriptors.
+            in separate module descriptors. If absent, setups the frontend in a "CLI-mode", when there's only two modules: 
+            one with currently compiled sources (including dependsOn-sources), and the second one with all dependencies. 
         """.trimIndent(),
         applicability = DirectiveApplicability.Global
     )

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/frontend/classic/ClassicFrontendFacade.kt

@@ -61,7 +61,7 @@ import org.jetbrains.kotlin.serialization.deserialization.MetadataPartProvider
 import org.jetbrains.kotlin.storage.LockBasedStorageManager
 import org.jetbrains.kotlin.storage.StorageManager
 import org.jetbrains.kotlin.test.directives.JvmEnvironmentConfigurationDirectives
-import org.jetbrains.kotlin.test.directives.MultiplatformDiagnosticsDirectives.MULTIPLATFORM_COMPOSITE_ANALYSIS_MODE
+import org.jetbrains.kotlin.test.directives.MultiplatformDiagnosticsDirectives.MULTIPLATFORM_COMPOSITE_ANALYSIS_MODE_ENABLED
 import org.jetbrains.kotlin.test.model.DependencyRelation
 import org.jetbrains.kotlin.test.model.FrontendFacade
 import org.jetbrains.kotlin.test.model.FrontendKinds
@@ -347,8 +347,8 @@ class ClassicFrontendFacade(
         files: List<KtFile>,
     ): AnalysisResult {
         // See 'TODO' for adding dependency manager
-        require(module.dependsOnDependencies.isEmpty() || MULTIPLATFORM_COMPOSITE_ANALYSIS_MODE !in module.directives) {
+        require(module.dependsOnDependencies.isEmpty() || MULTIPLATFORM_COMPOSITE_ANALYSIS_MODE_ENABLED !in module.directives) {
-            "Analyzing common modules with 'dependsOn' edges in ${MULTIPLATFORM_COMPOSITE_ANALYSIS_MODE.name} is not supported yet.\n" +
+            "Analyzing common modules with 'dependsOn' edges in ${MULTIPLATFORM_COMPOSITE_ANALYSIS_MODE_ENABLED.name} is not supported yet.\n" +
                     "Module: ${module.name}\n" +
                     "dependsOn: ${module.dependsOnDependencies.map { it.moduleName }}"
         }

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/frontend/classic/MultiplatformAnalysisConfiguration.kt

@@ -18,12 +18,12 @@ import org.jetbrains.kotlin.resolve.ModulePath
 import org.jetbrains.kotlin.resolve.ModuleStructureOracle
 import org.jetbrains.kotlin.resolve.TargetEnvironment
 import org.jetbrains.kotlin.resolve.multiplatform.isCommonSource
-import org.jetbrains.kotlin.test.directives.MultiplatformDiagnosticsDirectives.MULTIPLATFORM_COMPOSITE_ANALYSIS_MODE
+import org.jetbrains.kotlin.test.directives.MultiplatformDiagnosticsDirectives.MULTIPLATFORM_COMPOSITE_ANALYSIS_MODE_ENABLED
 import org.jetbrains.kotlin.test.model.*
 import org.jetbrains.kotlin.test.services.*
 
 internal fun MultiplatformAnalysisConfiguration(testServices: TestServices): MultiplatformAnalysisConfiguration {
-    return if (testServices.moduleStructure.allDirectives.contains(MULTIPLATFORM_COMPOSITE_ANALYSIS_MODE))
+    return if (testServices.moduleStructure.allDirectives.contains(MULTIPLATFORM_COMPOSITE_ANALYSIS_MODE_ENABLED))
         MultiplatformCompositeAnalysisConfiguration(
             testServices.dependencyProvider,
             testServices.sourceFileProvider,

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

@@ -13,7 +13,7 @@ abstract class AbstractDiagnosticsWithMultiplatformCompositeAnalysisTest : Abstr
     override fun configure(builder: TestConfigurationBuilder) {
         super.configure(builder)
         builder.defaultDirectives {
-            +MultiplatformDiagnosticsDirectives.MULTIPLATFORM_COMPOSITE_ANALYSIS_MODE
+            +MultiplatformDiagnosticsDirectives.MULTIPLATFORM_COMPOSITE_ANALYSIS_MODE_ENABLED
             LanguageSettingsDirectives.LANGUAGE with "+MultiPlatformProjects"
         }
     }