fix(runtime): Restore default signal handler after user handlers are unregistered (#22757)

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Fixes #22724. Fixes #7164.

This does add a dependency on `signal-hook`, but it's just a higher
level API on top of `signal-hook-registry` (which we and `tokio` already
depend on) and doesn't add any transitive deps.

tests/unit_node/process_test.ts

@@ -237,7 +237,7 @@ Deno.test({
 
 Deno.test({
   name: "process.off signal",
-  ignore: true, // This test fails to terminate
+  ignore: Deno.build.os == "windows",
   async fn() {
     const testTimeout = setTimeout(() => fail("Test timed out"), 10_000);
     try {
@@ -246,13 +246,13 @@ Deno.test({
           "eval",
           `
           import process from "node:process";
-          console.log("ready");
           setInterval(() => {}, 1000);
           const listener = () => {
+            process.off("SIGINT", listener);
             console.log("foo");
-            process.off("SIGINT", listener)
           };
           process.on("SIGINT", listener);
+          console.log("ready");
           `,
         ],
         stdout: "piped",
@@ -275,6 +275,7 @@ Deno.test({
       while (!output.includes("foo\n")) {
         await delay(10);
       }
+      process.kill("SIGINT");
       await process.status;
     } finally {
       clearTimeout(testTimeout);