Update eslint to v9 (#35485)

Update eslint and all plugins. Many plugins still do not ship type
definitions so I had to add stubs. Also, I had to put a few typescript
error expectations because if some unknown error in the types.

`eslint-plugin-no-jquery` is disabled because it's not compatible with
eslint 9 flat config
(https://github.com/wikimedia/eslint-plugin-no-jquery/issues/311).

web_src/js/markup/html2markdown.ts

@@ -4,13 +4,13 @@ type Processor = (el: HTMLElement) => string | HTMLElement | void;
 
 type Processors = {
   [tagName: string]: Processor;
-}
+};
 
 type ProcessorContext = {
   elementIsFirst: boolean;
   elementIsLast: boolean;
   listNestingLevel: number;
-}
+};
 
 function prepareProcessors(ctx:ProcessorContext): Processors {
   const processors: Processors = {