Apply fixes form the community

[this-username-has-been-taken]

This task aims to apply various fixes from the community to the kernel module including:

1. Memory usage optimization: fix: free old buffers and reset mods_size in jp_spec_setup amnezia-vpn/amneziawg-linux-kernel-module#142
2. Junk packets reordering: Fix: Junk packets can go in wrong order if device is behind QoS amnezia-vpn/amneziawg-linux-kernel-module#144
3. Kernels ver. 6.19+ compatibility and netlink diagnostics: fix: improve 6.19 compatibility and add netlink diagnostics amnezia-vpn/amneziawg-linux-kernel-module#150

[this-username-has-been-taken]

Fixes applied