[clang] [lldb] [clang] Add -ast-dump-filter-path to filter AST dump by file path (PR #194266)

[Aaron Ballman via cfe-commits]

================
@@ -8700,6 +8700,13 @@ def ast_dump_filter : Separate<["-"], "ast-dump-filter">,
   MarshallingInfoString<FrontendOpts<"ASTDumpFilter">>;
 def ast_dump_filter_EQ : Joined<["-"], "ast-dump-filter=">,
   Alias<ast_dump_filter>;
+def ast_dump_filter_path : Separate<["-"], "ast-dump-filter-path">,
+  MetaVarName<"<path_filter>">,
+  HelpText<"Use with -ast-dump or -ast-print to dump/print only AST declaration"
----------------
AaronBallman wrote:

```suggestion
  HelpText<"Use with '-ast-dump' or '-ast-print' to dump/print only AST declaration"
```

https://github.com/llvm/llvm-project/pull/194266