[v6.x] fs: fix `createReadStream(…, {end: n})` for non-seekable fds
Backport #19329 to v6.x
The test file needed to be updated & has merge conflicts from neighbouring tests resolved.
Fixes: #19240 (closed)
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Backport #19329 to v6.x
The test file needed to be updated & has merge conflicts from neighbouring tests resolved.
Fixes: #19240 (closed)