wifi: ath12k: Use ath12k_dp_peer in per packet Tx & Rx paths

wifi: ath12k: Use ath12k_dp_peer in per packet Tx & Rx paths

Move link agnostic data path parameters (keys, rx_tid, reorder buffers, MIC
context etc) from ath12k_sta and ath12k_dp_link_peer into ath12k_dp_peer. These
parameters are shared across MLO links and should be managed at the peer level.
Configure them only when the link peer is primary to avoid redundancy and ensure
consistent setup.

Switch per-packet Tx/Rx paths and monitor paths to look up ath12k_dp_peer and
ath12k_dp_link_peer via peer_id.

Helper APIs added:
 - ath12k_dp_peer_find_by_peerid()
 - ath12k_dp_link_peer_find_by_peerid()

Ensure RCU read lock is held when using these helpers APIs.

With the above API ath12k_dp_link_peer_find_by_peerid() being used to find
ath12k_dp_link_peer, existing API ath12k_dp_link_peer_find_by_id() is required
only at the time of unmap event from firmware since it fetches the
ath12k_dp_link_peer from linked list.

In order to restrict the usage of API ath12k_dp_link_peer_find_by_id(), make it
static and also rename it to ath12k_dp_link_peer_search_by_id().

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Signed-off-by: Harsh Kumar Bijlani <quic_hbijlani@quicinc.com>
Signed-off-by: Ripan Deuri <quic_rdeuri@quicinc.com>
Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
Reviewed-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>
Link: https://patch.msgid.link/20251024181548.3255166-9-quic_rdeuri@quicinc.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>