chore: reveal inner tests log

It's already formatted in conformity to usual `cargo test`.
Also, remove unused command-line arguments from `picodata test` command.

Close https://git.picodata.io/picodata/picodata/picodata/-/issues/61

src/args.rs

@@ -168,10 +168,7 @@ impl Tarantool {
 
 #[derive(Debug, Parser, tlua::Push)]
 #[clap(about = "Run picodata integration tests")]
-pub struct Test {
-    #[clap(flatten)]
-    pub run: Run,
-}
+pub struct Test {}
 
 impl Test {
     pub fn tt_args(&self) -> Result<Vec<CString>, String> {

test/inner.rs

 fn main() {
-    let mut cmd = std::process::Command::new(env!("CARGO_BIN_EXE_picodata"));
-    cmd.arg("test")
-        .args(["--instance-id", "i1", "--peer", "localhost"]);
-    cmd.output()
-        .map(|o| {
-            assert!(
-                o.status.success(),
-                "\ncommand failed: {:?}\nstdout:\n{}\nstderr:\n{}",
-                cmd,
-                String::from_utf8_lossy(&o.stdout),
-                String::from_utf8_lossy(&o.stderr),
-            )
-        })
-        .unwrap()
+    let status = std::process::Command::new(env!("CARGO_BIN_EXE_picodata"))
+        .arg("test")
+        .status()
+        .unwrap();
+
+    assert!(status.success());
 }