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.

1 files changed, 8 insertions, 0 deletions

diff --git a/tests/testdata/workers/test_worker.js b/tests/testdata/workers/test_worker.js
new file mode 100644
index 000000000..2b2d1eeec
--- /dev/null
+++ b/tests/testdata/workers/test_worker.js
@@ -0,0 +1,8 @@
+if (self.name !== "") {
+  throw Error(`Bad worker name: ${self.name}, expected empty string.`);
+}
+
+onmessage = function (e) {
+  postMessage(e.data);
+  close();
+};