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/repl_test.ts

@@ -0,0 +1,17 @@
+// deno-lint-ignore-file no-undef
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+
+import repl from "node:repl";
+import { assert } from "@test_util/std/assert/mod.ts";
+
+Deno.test({
+  name: "repl module exports",
+  fn() {
+    assert(typeof repl.REPLServer !== "undefined");
+    assert(typeof repl.start !== "undefined");
+    // @ts-ignore not present in declaration files, but libraries depend on it
+    assert(typeof repl.builtinModules !== "undefined");
+    // @ts-ignore not present in declaration files, but libraries depend on it
+    assert(typeof repl._builtinLibs !== "undefined");
+  },
+});