LU-13802 ptlrpc: correctly remove inflight request

LU-13802 ptlrpc: correctly remove inflight request

When removing a request from the active set on error, we
must also remove it from "inflight" or we will not reduce
inflight as needed and hang on cleanup.

This bug has been latent for some time, but running sanity
414 with hybrid IO tends to trigger it.

Signed-off-by: Patrick Farrell <patrick.farrell@oracle.com>
Change-Id: Ib73980724f6e2f5a74400a39840df2e8835a6e23
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/54099
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Alex Zhuravlev <bzzz@whamcloud.com>