LU-16180 ptlrpc: reduce lock contention in ptlrpc_free_committed

LU-16180 ptlrpc: reduce lock contention in ptlrpc_free_committed

This patch breaks out of the loop in ptlrpc_free_committed()
if need_resched() is true or there are other threads waiting
on the imp_lock. This can avoid the thread holding the
CPU for too long time to free large number of requests. The
remaining requests in the list will be processed the next
time this function is called. That also avoids delaying a
single thread too long if the list is long.

Test-Parameters: testlist=sanity clientdistro=el8.6
Test-Parameters: testlist=sanity clientdistro=ubuntu2204 env=SANITY_EXCEPT="130 244a"

Change-Id: I50f56b87844e8b019053e569767b6c949d2a3f55
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Jian Yu <yujian@whamcloud.com>