[FIR] Implement flag for disabling warning on error suppression

#KT-61129

compiler/test-infrastructure/tests/org/jetbrains/kotlin/test/builders/LanguageVersionSettingsBuilder.kt

@@ -103,6 +103,7 @@ class LanguageVersionSettingsBuilder {
             analysisFlag(AnalysisFlags.allowResultReturnType, trueOrNull(LanguageSettingsDirectives.ALLOW_RESULT_RETURN_TYPE in directives)),
             analysisFlag(AnalysisFlags.explicitApiMode, directives.singleOrZeroValue(LanguageSettingsDirectives.EXPLICIT_API_MODE)),
             analysisFlag(AnalysisFlags.allowKotlinPackage, trueOrNull(LanguageSettingsDirectives.ALLOW_KOTLIN_PACKAGE in directives)),
+            analysisFlag(AnalysisFlags.dontWarnOnErrorSuppression, trueOrNull(LanguageSettingsDirectives.DONT_WARN_ON_ERROR_SUPPRESSION in directives)),
 
             analysisFlag(JvmAnalysisFlags.jvmDefaultMode, directives.singleOrZeroValue(LanguageSettingsDirectives.JVM_DEFAULT_MODE)),
             analysisFlag(JvmAnalysisFlags.inheritMultifileParts, trueOrNull(LanguageSettingsDirectives.INHERIT_MULTIFILE_PARTS in directives)),

compiler/test-infrastructure/tests/org/jetbrains/kotlin/test/directives/LanguageSettingsDirectives.kt

@@ -99,6 +99,7 @@ object LanguageSettingsDirectives : SimpleDirectivesContainer() {
     val GENERATE_PROPERTY_ANNOTATIONS_METHODS by directive(
         description = "Enables corresponding analysis flag (JvmAnalysisFlags.generatePropertyAnnotationsMethods)"
     )
+    val DONT_WARN_ON_ERROR_SUPPRESSION by directive("Don't emit warning when an error is suppressed")
 
 
     // --------------------- Utils ---------------------