aya/test/integration-ebpf
Mohammad Javad Pooladkhay 9606690a73 aya: fix tc name limit
The buffer for attributes should be sized to hold at least 256 bytes, based on `CLS_BPF_NAME_LEN = 256` from the kernel:
https://github.com/torvalds/linux/blob/02aee814/net/sched/cls_bpf.c#L28

Fixes: 

aya: add netlink_clsact_qdisc_exists function

public-api: add clsact_qdisc_exists

integration-test: add tc_name_limit

integration-test: add tc_name_limit_exceeded

Signed-off-by: Mohammad Javad Pooladkhay <m.pooladkhay@gmail.com>
..
.cargo integration-ebpf: add cargo config
src aya: fix tc name limit
Cargo.toml aya: fix tc name limit
build.rs integration-test: Remove cargo symlink workaround
rust-toolchain.toml integration-test: use nightly toolchain with ebpf