ksmbd: compute lease break-in-progress flag on response

ksmbd: compute lease break-in-progress flag on response

SMB2_LEASE_FLAG_BREAK_IN_PROGRESS is a transient create response flag,
not persistent lease state.

Do not store the flag in lease->flags when a same-key open is granted
during a pending break. Instead, derive it from lease opens that are still
waiting for a break ACK while building the lease create response, and keep
lease->flags for persistent lease flags such as the parent lease key.

This clears the flag naturally after the break ACK completes and fixes
reopen responses that report BREAK_IN_PROGRESS after the lease is no
longer breaking.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>