fix(node): add missing process.reallyExit method (#19326)

This PR adds the missing `process.reallyExit()` method to node's
`process` object.

Was [pinged on
twitter](https://twitter.com/biwanczuk/status/1663326659787862017)
regarding running the `fastify` test suite in node. They use `node-tap`
which has been around arguably the longest of the test frameworks and
relies on a couple of old APIs. They have `signal-exit` as a dependency
which in turn [makes use of
`process.reallyExit()`](https://github.com/tapjs/signal-exit/blob/8fa7fc9a9c63f559af43d292b7eb727901775507/src/index.ts#L19).
That function cannot be found anywhere in their documentation, but
exists at runtime. See
https://github.com/nodejs/node/blob/6a6b3c54022104cc110ab09044a2a0cecb8988e7/lib/internal/bootstrap/node.js#L172

This doesn't yet make `node-tap` work, but gets us one step closer.

1 files changed, 10 insertions, 0 deletions

diff --git a/cli/tests/unit_node/testdata/process_really_exit.ts b/cli/tests/unit_node/testdata/process_really_exit.ts
new file mode 100644
index 000000000..16f30b33d
--- /dev/null
+++ b/cli/tests/unit_node/testdata/process_really_exit.ts
@@ -0,0 +1,10 @@
+import process from "node:process";
+
+//deno-lint-ignore no-undef
+// @ts-ignore - Node typings don't even have this because it's
+// been deprecated for 4 years. But it's used in `signal-exit`,
+// which in turn is used in `node-tap`.
+process.reallyExit = function () {
+  console.info("really exited");
+};
+process.exit();