Migrate to DPDK25.11 LTS

[byteocean]

Prepared to migrate to DPDK25.11 LTS

[PlagueCZ]

Should we not use the new DPDK macros for packed structures instead of using gcc-based ones? Not sure how we discussed it last time.

Where did the MTU patch reversal go? It was needed to not break stuff (force MTU to 1500 on PF0/1) on the host.

[byteocean]

you meant __rte_packed_begin and __rte_packed_end? @PlagueCZ

[PlagueCZ]

you meant __rte_packed_begin and __rte_packed_end? @PlagueCZ

Yes. I do not remember the result of our discussion last time, but I think we should use them, then if we want to go back to DPDK24, we can simply define them ourselves as (none) and _rte_packed to simulate them, but the code can use them easily.

But maybe we found a reason why use the GCC ones, though I do not remember.