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, 47 insertions, 0 deletions

diff --git a/tests/testdata/tls/README.md b/tests/testdata/tls/README.md
new file mode 100644
index 000000000..19bbaec35
--- /dev/null
+++ b/tests/testdata/tls/README.md
@@ -0,0 +1,47 @@
+The certificates in this dir expire on Sept, 27th, 2118
+
+Certificates generated using original instructions from this gist:
+https://gist.github.com/cecilemuller/9492b848eb8fe46d462abeb26656c4f8
+
+## Certificate authority (CA)
+
+Generate RootCA.pem, RootCA.key, RootCA.crt:
+
+```shell
+openssl req -x509 -nodes -new -sha256 -days 36135 -newkey rsa:2048 -keyout RootCA.key -out RootCA.pem -subj "/C=US/CN=Example-Root-CA"
+openssl x509 -outform pem -in RootCA.pem -out RootCA.crt
+```
+
+Note that Example-Root-CA is an example, you can customize the name.
+
+## Domain name certificate
+
+First, create a file domains.txt that lists all your local domains (here we only
+list localhost):
+
+```shell
+authorityKeyIdentifier=keyid,issuer
+basicConstraints=CA:FALSE
+keyUsage = digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment
+subjectAltName = @alt_names
+[alt_names]
+DNS.1 = localhost
+```
+
+Generate localhost.key, localhost.csr, and localhost.crt:
+
+```shell
+openssl req -new -nodes -newkey rsa:2048 -keyout localhost.key -out localhost.csr -subj "/C=US/ST=YourState/L=YourCity/O=Example-Certificates/CN=localhost.local"
+openssl x509 -req -sha256 -days 36135 -in localhost.csr -CA RootCA.pem -CAkey RootCA.key -CAcreateserial -extfile domains.txt -out localhost.crt
+```
+
+Note that the country / state / city / name in the first command can be
+customized.
+
+For testing purposes we need following files:
+
+- `RootCA.crt`
+- `RootCA.key`
+- `RootCA.pem`
+- `localhost.crt`
+- `localhost.key`