Implement new filePath method suggestion

Co-authored-by: Robert <robertbrignull@github.com>

Author: norascheuch

extensions/ql-vscode/src/remote-queries/variant-analysis-manager.ts

@@ -111,7 +111,7 @@ export class VariantAnalysisManager extends DisposableObject implements VariantA
   }
 
   private async variantAnalysisRecordExists(variantAnalysisId: number): Promise<boolean> {
-    const filePath = path.join(this.storagePath, variantAnalysisId.toString());
+    const filePath = this.getVariantAnalysisStorageLocation(variantAnalysisId);
     return await fs.pathExists(filePath);
   }