tests: rework the actually useful tests to live in the integration crate

crates/irtt-client/tests/client/mod.rs

@@ -0,0 +1,22 @@
+use super::*;
+use irtt_client::NegotiationPolicy;
+use irtt_client::{NegotiatedParams, RunMode, WarningKind, MAX_UDP_PAYLOAD_LENGTH};
+use irtt_proto::{flags, Params, TimestampFields};
+use irtt_proto::{
+    flags::FLAG_HMAC, flags::FLAG_OPEN, flags::FLAG_REPLY, verify_packet_hmac, Clock, HMAC_SIZE,
+    MAGIC,
+};
+use std::thread;
+#[cfg(all(target_os = "linux", feature = "ancillary"))]
+use std::time::SystemTime;
+
+mod support;
+use support::*;
+
+mod close;
+mod config;
+mod hmac;
+mod no_test;
+mod open;
+mod probes_replies;
+mod ttl;