refactor(cli): clean up test runner channels (#22422)

Gets us closer to solving #20707.

Rewrites the `TestEventSender`:

- Allow for explicit creation of multiple streams. This will allow for
one-std{out,err}-per-worker
- All test events are received along with a worker ID, allowing for
eventual, proper parallel threading of test events.
 
In theory this should open up proper interleaving of test output,
however that is left for a future PR.

I had some plans for a better performing synchronization primitive, but
the inter-thread communication is tricky. This does, however, speed up
the processing of large numbers of tests 15-25% (possibly even more on
100,000+).

Before

```
ok | 1000 passed | 0 failed (32ms)
ok | 10000 passed | 0 failed (276ms)
```

After

```
ok | 1000 passed | 0 failed (25ms)
ok | 10000 passed | 0 failed (230ms)
```

1 files changed, 3 insertions, 2 deletions

diff --git a/cli/tools/repl/session.rs b/cli/tools/repl/session.rs
index a52eb095f..65e27136f 100644
--- a/cli/tools/repl/session.rs
+++ b/cli/tools/repl/session.rs
@@ -14,6 +14,7 @@ use crate::tools::test::reporters::TestReporter;
 use crate::tools::test::run_tests_for_worker;
 use crate::tools::test::worker_has_tests;
 use crate::tools::test::TestEvent;
+use crate::tools::test::TestEventReceiver;
 use crate::tools::test::TestEventSender;
 
 use deno_ast::diagnostics::Diagnostic;
@@ -183,7 +184,7 @@ pub struct ReplSession {
   test_reporter_factory: Box<dyn Fn() -> Box<dyn TestReporter>>,
   test_event_sender: TestEventSender,
   /// This is only optional because it's temporarily taken when evaluating.
-  test_event_receiver: Option<tokio::sync::mpsc::UnboundedReceiver<TestEvent>>,
+  test_event_receiver: Option<TestEventReceiver>,
   jsx: ReplJsxState,
   experimental_decorators: bool,
 }
@@ -196,7 +197,7 @@ impl ReplSession {
     mut worker: MainWorker,
     main_module: ModuleSpecifier,
     test_event_sender: TestEventSender,
-    test_event_receiver: tokio::sync::mpsc::UnboundedReceiver<TestEvent>,
+    test_event_receiver: TestEventReceiver,
   ) -> Result<Self, AnyError> {
     let language_server = ReplLanguageServer::new_initialized().await?;
     let mut session = worker.create_inspector_session().await;