fix: op_set_exit_code (#13034)

Fixes "op_set_exit_code" by sharing a single "Arc" between
all workers (via "op state") instead of having a "global" value stored in
"deno_runtime" crate. As a consequence setting an exit code is always
scoped to a tree of workers, instead of being overridable if there are
multiple worker tree (like in "deno test --jobs" subcommand).

Refactored "cli/main.rs" functions to return "Result<i32, AnyError>" instead
of "Result<(), AnyError>" so they can return exit code.

1 files changed, 4 insertions, 0 deletions

diff --git a/cli/tests/testdata/set_exit_code_worker.js b/cli/tests/testdata/set_exit_code_worker.js
new file mode 100644
index 000000000..d1c0123d1
--- /dev/null
+++ b/cli/tests/testdata/set_exit_code_worker.js
@@ -0,0 +1,4 @@
+// Set exit code
+Deno.core.opSync("op_set_exit_code", 42);
+
+self.postMessage("ok");