Generate GeneralizingAstVisitor, TimedAstVisitor, AnalysisRuleVisitor and AstVisitor.

Fixed an incorrect name `_forRecordLiterals` in
`RuleVisitorRegistryImpl`.

Refactored existing generators to reduce code duplication, extracted
_Node class and made helper extensions.

For context I am currently reading Crafting Interpreters by Robert
Nystrom and was inspired to use the code generation shown in the book.

Change-Id: Ia26aa2f697b98dae89903648758c2ca47d1823ec
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/442561
Reviewed-by: Brian Wilkerson <[email protected]>
Reviewed-by: Konstantin Shcheglov <[email protected]>
Commit-Queue: Konstantin Shcheglov <[email protected]>

Author: fshcheglov

pkg/analyzer/api.txt

@@ -2191,6 +2191,7 @@ package:analyzer/dart/ast/visitor.dart:
     visitCollectionElement (method: R? Function(CollectionElement))
     visitCombinator (method: R? Function(Combinator))
     visitComment (method: R? Function(Comment))
+    visitCommentReferableExpression (method: R? Function(CommentReferableExpression))
     visitCommentReference (method: R? Function(CommentReference))
     visitCompilationUnit (method: R? Function(CompilationUnit))
     visitCompilationUnitMember (method: R? Function(CompilationUnitMember))
@@ -2237,6 +2238,7 @@ package:analyzer/dart/ast/visitor.dart:
     visitForEachPartsWithIdentifier (method: R? Function(ForEachPartsWithIdentifier))
     visitForEachPartsWithPattern (method: R? Function(ForEachPartsWithPattern))
     visitForElement (method: R? Function(ForElement))
+    visitForLoopParts (method: R? Function(ForLoopParts))
     visitForParts (method: R? Function(ForParts))
     visitForPartsWithDeclarations (method: R? Function(ForPartsWithDeclarations))
     visitForPartsWithExpression (method: R? Function(ForPartsWithExpression))
@@ -2364,6 +2366,7 @@ package:analyzer/dart/ast/visitor.dart:
     visitVariableDeclaration (method: R? Function(VariableDeclaration))
     visitVariableDeclarationList (method: R? Function(VariableDeclarationList))
     visitVariableDeclarationStatement (method: R? Function(VariableDeclarationStatement))
+    visitVariablePattern (method: R? Function(VariablePattern))
     visitWhenClause (method: R? Function(WhenClause))
     visitWhileStatement (method: R? Function(WhileStatement))
     visitWildcardPattern (method: R? Function(WildcardPattern))