LU-10911 idl: add OBD_CONNECT2_FLR_EC flag

LU-10911 idl: add OBD_CONNECT2_FLR_EC flag

The new connect2 flag indicates when I/O data containing
parity data can be handled. The field l_ost_gen for
struct lov_ost_data_v1 has never been used. We can use
it to classify OST object data.

Test-Parameters: trivial
Change-Id: I4883c7f5bb80690de7b3fe65144baa70538bd4d6
Signed-off-by: James Simmons <jsimmons@infradead.org>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/58843
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Patrick Farrell <pfarrell@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>