Add support for using tls connection

[SndR85]

I've notices that it isn't possible to setup a ssl connection with the module of mysql. With this change the parameter ssl can be set. This enables users to set a minion config with the following config:

mysql.ssl:
  ca: /path/to/ca.pem

This will pass the ssl parameter to the underlying library with the dictionary as supported by MySQLdb and PyMySQL

[lkubb]

@scornelissen85 Sorry it took a while - this extension sadly was not finished migrating when you initially submitted this PR.

Would you mind rebasing on main, writing a quick feature request, adding a changelog file and adding the new SSL param to the documentation at the top of the file? A test would be awesome, but connection params seem to be tested poorly currently, so it's fine if you don't write one.

The changelog entry could be created like this:

echo "Added support for specifying TLS connection parameters to the execution module" > changelog/<feature_request_#, e.g. 2>.added.md

[SndR85]

I have rebased the code. I was actually looking to add some tests, I thought that it maybe could be added as functional test? I discoved the usage of different MySQL containers. However, I've got a bit stuck in complexity about how to implement that with custom certificates. I could use the cryptography package to create a CA and server cert and key and then mount these files in the container. Then I could write test to verify it connects with the server. But it seems a bit hacky to me.

I have created a feature request (#4) and added a changelog.

[lkubb]

Thanks! :) I'm merging this in as is since it's a simple and important fix. I suspect the modules here need some updating/refactoring, especially after the migration to an extension. This process could be used to improve test coverage.

I would love a functional test for this in theory, but as you mentioned, the fixture setup complexity is very high:

1. Create two private keys + certificates (CA + MySQL server) (one could just use the x509_v2 modules though, no need to go as low-level as cryptography)
2. Ensure CN (SAN?) contains a reachable domain (or somehow disable host name verification)
3. Mount the files into the container
4. Configure MySQL to use the generated certificate
5. Ensure the minion_config contains the CA cert that was used to create the certificate above