Exclude pr schemed files from js/ts language features

Fixes #105842

extensions/typescript-language-features/src/utils/fileSchemes.ts

@@ -6,8 +6,8 @@
 export const file = 'file';
 export const untitled = 'untitled';
 export const git = 'git';
+export const pr = 'pr';
 export const privateScheme = 'private';
-
 /** Live share scheme */
 export const vsls = 'vsls';
 export const walkThroughSnippet = 'walkThroughSnippet';
@@ -24,4 +24,5 @@ export const disabledSchemes = new Set([
 	git,
 	vsls,
 	privateScheme,
+	pr,
 ]);