K2: introduce infrastructure for LanguageVersionSettings checkers

compiler/fir/entrypoint/src/org/jetbrains/kotlin/fir/checkers/CheckersContainers.kt

@@ -19,12 +19,14 @@ fun FirSessionConfigurator.registerCommonCheckers() {
     useCheckers(CommonDeclarationCheckers)
     useCheckers(CommonExpressionCheckers)
     useCheckers(CommonTypeCheckers)
+    useCheckers(CommonLanguageVersionSettingsCheckers)
 }
 
 fun FirSessionConfigurator.registerExtendedCommonCheckers() {
     useCheckers(ExtendedExpressionCheckers)
     useCheckers(ExtendedDeclarationCheckers)
     useCheckers(ExtendedTypeCheckers)
+    useCheckers(ExtendedLanguageVersionSettingsCheckers)
 }
 
 fun FirSessionConfigurator.registerJvmCheckers() {

compiler/fir/entrypoint/src/org/jetbrains/kotlin/fir/pipeline/analyse.kt

@@ -21,6 +21,7 @@ fun FirSession.runResolution(firFiles: List<FirFile>): Pair<ScopeSession, List<F
 
 fun FirSession.runCheckers(scopeSession: ScopeSession, firFiles: List<FirFile>, reporter: DiagnosticReporter) {
     val collector = FirDiagnosticsCollector.create(this, scopeSession)
+    collector.collectDiagnosticsInSettings(reporter)
     for (file in firFiles) {
         withFileAnalysisExceptionWrapping(file) {
             collector.collectDiagnostics(file, reporter)

compiler/fir/entrypoint/src/org/jetbrains/kotlin/fir/session/FirSessionConfigurator.kt

@@ -7,6 +7,7 @@ package org.jetbrains.kotlin.fir.session
 
 import org.jetbrains.kotlin.fir.FirSession
 import org.jetbrains.kotlin.fir.SessionConfiguration
+import org.jetbrains.kotlin.fir.analysis.checkers.LanguageVersionSettingsCheckers
 import org.jetbrains.kotlin.fir.analysis.checkers.declaration.DeclarationCheckers
 import org.jetbrains.kotlin.fir.analysis.checkers.expression.ExpressionCheckers
 import org.jetbrains.kotlin.fir.analysis.checkers.type.TypeCheckers
@@ -36,6 +37,11 @@ class FirSessionConfigurator(private val session: FirSession) {
         session.checkersComponent.register(checkers)
     }
 
+    @OptIn(SessionConfiguration::class)
+    fun useCheckers(checkers: LanguageVersionSettingsCheckers) {
+        session.checkersComponent.register(checkers)
+    }
+
     @OptIn(PluginServicesInitialization::class)
     @SessionConfiguration
     fun configure() {