ci: add test-vanilla-release & test-fork-release CI stages

Summary

• ci: add test-vanilla-release & test-fork-release CI stages + fix tests which were failing
• add ability to do #[tarantool::test(should_panic = cfg!(debug_assertions))]

Ensure that

• New code is covered by tests
• API is documented
• Changelog is up to date
• Version is bumped in the appropriate Cargo.toml files

tarantool/src/network/client/tcp.rs

@@ -776,11 +776,26 @@ mod tests {
     }
 
     fn get_fds() -> Vec<u32> {
+        let mut buffer = Vec::<u8>::with_capacity(4096);
+
         let mut res = vec![];
         for entry in std::fs::read_dir("/dev/fd/").unwrap() {
             // Yay rust!
             let entry = entry.unwrap();
+            dbg!(entry.metadata().unwrap());
             let fd_path = entry.path();
+
+            unsafe {
+                let len = libc::readlink(
+                    fd_path.as_os_str().as_encoded_bytes().as_ptr() as _,
+                    buffer.as_mut_ptr() as _,
+                    buffer.len() as _,
+                );
+                assert!(len >= 0);
+                buffer.set_len(len as _);
+                dbg!(String::from_utf8_lossy(&buffer));
+            };
+
             let fd_str = fd_path.file_name().unwrap();
             let fd: u32 = fd_str.to_str().unwrap().parse().unwrap();
             res.push(fd);