chore: move cli/tests/ -> tests/ (#22369)

This looks like a massive PR, but it's only a move from cli/tests ->
tests, and updates of relative paths for files.

This is the first step towards aggregate all of the integration test
files under tests/, which will lead to a set of integration tests that
can run without the CLI binary being built.

While we could leave these tests under `cli`, it would require us to
keep a more complex directory structure for the various test runners. In
addition, we have a lot of complexity to ignore various test files in
the `cli` project itself (cargo publish exclusion rules, autotests =
false, etc).

And finally, the `tests/` folder will eventually house the `test_ffi`,
`test_napi` and other testing code, reducing the size of the root repo
directory.

For easier review, the extremely large and noisy "move" is in the first
commit (with no changes -- just a move), while the remainder of the
changes to actual files is in the second commit.

tests/unit_node/_fs/_fs_mkdir_test.ts

@@ -0,0 +1,43 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+import * as path from "@test_util/std/path/mod.ts";
+import { assert } from "@test_util/std/assert/mod.ts";
+import { assertCallbackErrorUncaught } from "../_test_utils.ts";
+import { existsSync, mkdir, mkdirSync } from "node:fs";
+
+const tmpDir = "./tmpdir";
+
+Deno.test({
+  name: "[node/fs] mkdir",
+  fn: async () => {
+    const result = await new Promise((resolve) => {
+      mkdir(tmpDir, (err) => {
+        err && resolve(false);
+        resolve(existsSync(tmpDir));
+        Deno.removeSync(tmpDir);
+      });
+    });
+    assert(result);
+  },
+});
+
+Deno.test({
+  name: "[node/fs] mkdirSync",
+  fn: () => {
+    mkdirSync(tmpDir);
+    assert(existsSync(tmpDir));
+    Deno.removeSync(tmpDir);
+  },
+});
+
+Deno.test("[std/node/fs] mkdir callback isn't called twice if error is thrown", async () => {
+  const tempDir = await Deno.makeTempDir();
+  const subdir = path.join(tempDir, "subdir");
+  const importUrl = new URL("node:fs", import.meta.url);
+  await assertCallbackErrorUncaught({
+    prelude: `import { mkdir } from ${JSON.stringify(importUrl)}`,
+    invocation: `mkdir(${JSON.stringify(subdir)}, `,
+    async cleanup() {
+      await Deno.remove(tempDir, { recursive: true });
+    },
+  });
+});