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, 10 insertions, 0 deletions

diff --git a/tests/testdata/test/doc_only/mod.ts b/tests/testdata/test/doc_only/mod.ts
new file mode 100644
index 000000000..467d850a2
--- /dev/null
+++ b/tests/testdata/test/doc_only/mod.ts
@@ -0,0 +1,10 @@
+/**
+ * ```ts
+ * import "./mod.ts";
+ * ```
+ */
+Deno.test("unreachable", function () {
+  throw new Error(
+    "modules that don't end with _test are scanned for documentation tests only should not be executed",
+  );
+});