system: filesystems in exclude are excluded from content analysis

some disks can be very slow and noisy (at home). this allows users to simply skip them.
also, applicable for large storage boxes

src/test/common.js

@@ -228,7 +228,7 @@ async function domainSetup() {
 }
 
 async function setup() {
-    await fs.promises.rm(paths.DISK_USAGE_FILE, { force: true });
+    await fs.promises.rm(paths.DISK_USAGE_CACHE_FILE, { force: true });
     await domainSetup();
     const ownerId = await users.createOwner(admin.email, admin.username, admin.password, admin.displayName, auditSource);
     admin.id = ownerId;