feat!: Allow passing ssl_mode for MySQL Module

[davidcollom]

There is currently no way of passing the ssl_mode value from the module to the cloudsql_instance resource.

This PR aims to address this issue.

[imrannayer]

@davidcollom thx for the PR. Can you plz set min provider version to 5.7 as this feature was part of 5.6 and a fix for this was part of 5.7.
Can you plz add it to safer_mysql module?
Also if this is this something needed for postgres, can u plz add it to postgres modules?

[davidcollom]

Hey @imrannayer thanks for your quick response.

As for postgresql I'm not sure, as I don't use this.

As for the safer_mysql module... Would you expect TRUSTED_CLIENT_CERTIFICATE_REQUIRED to be enforced? Or default? As this imo would be the "safest default value"..or would/should we fall back to the providers default?

[davidcollom]

@imrannayer I've updated the safer_mysql module, and checked the postgresql module, which already includes this feature, which was added here: 9c59232

[g-awmalik]

/gcbrun

[g-awmalik]

@imrannayer - are you good with the changes?

[imrannayer]

LGTM

[davidcollom]

Hey @imrannayer @g-awmalik what's needed to get this merged in? All the CI has passed but pending code reviews.