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/testdata/npm/local_dir_resolves_symlinks/index.js

@@ -0,0 +1,3 @@
+import * as d from "define-properties";
+
+console.log(typeof d.default === "function", "it works");

tests/testdata/npm/local_dir_resolves_symlinks/index.out

@@ -0,0 +1,2 @@
+Download [WILDCARD]
+true it works

tests/testdata/npm/local_dir_resolves_symlinks/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "foo",
+  "type": "module",
+  "dependencies": {
+    "define-properties": "^1.2.0"
+  }
+}