SONAR-14550 Show analysis warning when scanner uses Java < 11

sonar-scanner-engine/src/main/java/org/sonar/scanner/bootstrap/GlobalContainer.java

 import org.sonar.api.SonarRuntime;
 import org.sonar.api.internal.MetadataLoader;
 import org.sonar.api.internal.SonarRuntimeImpl;
+import org.sonar.api.notifications.AnalysisWarnings;
 import org.sonar.api.utils.MessageException;
 import org.sonar.api.utils.System2;
 import org.sonar.api.utils.UriReader;
 import org.sonar.core.extension.CoreExtensionRepositoryImpl;
 import org.sonar.core.extension.CoreExtensionsLoader;
 import org.sonar.core.platform.ComponentContainer;
+import org.sonar.core.platform.PluginClassLoader;
 import org.sonar.core.platform.PluginClassloaderFactory;
 import org.sonar.core.platform.PluginInfo;
-import org.sonar.core.platform.PluginClassLoader;
 import org.sonar.core.platform.PluginRepository;
 import org.sonar.core.util.DefaultHttpDownloader;
 import org.sonar.core.util.UuidFactoryImpl;
 import org.sonar.scanner.extension.ScannerCoreExtensionsInstaller;
+import org.sonar.scanner.notifications.DefaultAnalysisWarnings;
 import org.sonar.scanner.platform.DefaultServer;
 import org.sonar.scanner.repository.DefaultMetricsRepositoryLoader;
 import org.sonar.scanner.repository.DefaultNewCodePeriodLoader;
     addBootstrapComponents();
   }
 
-  private static void checkJavaVersion() {
+  private static void checkJavaVersion(AnalysisWarnings analysisWarnings) {
     try {
       String.class.getMethod("isBlank");
     } catch (NoSuchMethodException e) {
-      LOG.warn("SonarScanner will require Java 11 to run starting in SonarQube 9.x");
+      LOG.warn("SonarScanner will require Java 11 to run, starting in SonarQube 9.x");
+      analysisWarnings.addUnique("SonarScanner will require Java 11 to run, starting in SonarQube 9.x. Please upgrade the version of Java that executes the scanner.");
     }
   }
 
   private void addBootstrapComponents() {
     Version apiVersion = MetadataLoader.loadVersion(System2.INSTANCE);
     SonarEdition edition = MetadataLoader.loadEdition(System2.INSTANCE);
+    DefaultAnalysisWarnings analysisWarnings = new DefaultAnalysisWarnings(System2.INSTANCE);
     if (edition != SonarEdition.SONARCLOUD) {
-      checkJavaVersion();
+      checkJavaVersion(analysisWarnings);
     }
     LOG.debug("{} {}", edition.getLabel(), apiVersion);
     add(
       DefaultServer.class,
       new GlobalTempFolderProvider(),
       DefaultHttpDownloader.class,
+      analysisWarnings,
       UriReader.class,
       PluginFiles.class,
       System2.INSTANCE,

sonar-scanner-engine/src/main/java/org/sonar/scanner/scan/ProjectScanContainer.java

 import org.sonar.scanner.issue.ignore.pattern.IssueInclusionPatternInitializer;
 import org.sonar.scanner.issue.ignore.scanner.IssueExclusionsLoader;
 import org.sonar.scanner.mediumtest.AnalysisObservers;
-import org.sonar.scanner.notifications.DefaultAnalysisWarnings;
 import org.sonar.scanner.postjob.DefaultPostJobContext;
 import org.sonar.scanner.postjob.PostJobOptimizer;
 import org.sonar.scanner.postjob.PostJobsExecutor;
       ContextPropertiesCache.class,
       ContextPropertiesPublisher.class,
 
-      DefaultAnalysisWarnings.class,
-
       SensorStrategy.class,
 
       MutableProjectSettings.class,