fix(gda): set gid_type when ROCSHMEM_IB_GID_INDEX forces the GID

[bleech243]

MLX5 moves QPs to RTR/RTS through mlx5dv.modify_qp(), which takes the GID type as an explicit argument because userspace builds the QP address vector itself. The generic ibv_modify_qp() path did not need this: the kernel derived the RoCE version from the GID entry that sgid_index points at.

select_gid_index() only assigned nic.gid_type on the automatic-probe path, so the ROCSHMEM_IB_GID_INDEX override updated nic.gid_index and nic.gid but left nic.gid_type at the value the probe had picked. The probe prefers RoCEv2, so forcing a RoCEv1 index such as GID 0 built an address vector as RoCEv2 while sgid_index selected a RoCEv1 GID, and the NIC rejected the transition with EREMOTEIO (121) from modify_qps_init_to_rtr().

Take gid_type from the GID table entry of the forced index so it always matches sgid_index.

[hygon-ai-reviewer]

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