Add lint rule for as any and bulk ignore all existing breaks

For #269213

This adds a new eslint rule for `as any` and `<any>({... })`. We'd like to remove almost all of these, however right now the first goal is to prevent them in new code. That's why with this first PR I simply add `eslint-disable` comments for all breaks

Trying to get this change in soon after branching off for release to hopefully minimize disruption during debt week work

extensions/markdown-language-features/src/markdownEngine.ts

@@ -143,6 +143,7 @@ export class MarkdownItEngine implements IMdParser {
 				const frontMatterPlugin = await import('markdown-it-front-matter');
 				// Extract rules from front matter plugin and apply at a lower precedence
 				let fontMatterRule: any;
+				// eslint-disable-next-line local/code-no-any-casts
 				frontMatterPlugin.default(<any>{
 					block: {
 						ruler: {