Remove the check that if base file name starts with ^ is dynamic file name since those files can exist (#36109)

Fixes #35734

src/server/scriptInfo.ts

@@ -272,7 +272,7 @@ namespace ts.server {
 
     /*@internal*/
     export function isDynamicFileName(fileName: NormalizedPath) {
-        return fileName[0] === "^" || getBaseFileName(fileName)[0] === "^";
+        return fileName[0] === "^";
     }
 
     /*@internal*/