Deprecate all diagnostics methods that use strings.

pkg/analyzer/test/generated/parser_fasta_test.dart

Index: pkg/analyzer/test/generated/parser_fasta_test.dart
diff --git a/pkg/analyzer/test/generated/parser_fasta_test.dart b/pkg/analyzer/test/generated/parser_fasta_test.dart
index 00b242fa9d8f174eb8181a9f7632484f661c8cb4..c14ef270805c8cde6e014664a6f78e2bfbad8900 100644
--- a/pkg/analyzer/test/generated/parser_fasta_test.dart
+++ b/pkg/analyzer/test/generated/parser_fasta_test.dart
@@ -791,7 +791,7 @@ class KernelLibraryBuilderProxy implements KernelLibraryBuilder {
   Uri get fileUri => uri;
 
   @override
-  void addCompileTimeError(int charOffset, Object message,
+  void deprecated_addCompileTimeError(int charOffset, Object message,
       {Uri fileUri, bool silent: false, bool wasHandled: false}) {
     fail('$message');
   }