Return all available connection information on each RDS reconcile

[hasheddan]

Signed-off-by: hasheddan georgedanielmangum@gmail.com

Description of your changes

This updates the RDS controller to return any available connection details on each reconcile. Some are expected to only be available in Create or Observe, but using a consistent strategy for propagating makes reasoning about which values are being updated simpler and avoids having to specify connection details in each location.

Hopefully fixes https://github.com/crossplane/crossplane/issues/1575, but it needs to be additionally tested as I have not reproduced the behavior describe in that issue with the v0.1.0 release.

Opening for early review in case any folks more familiar with Alibaba may know what the underlying issue here may be.

Checklist

I have:

• [x] Run make reviewable to ensure this PR is ready for review.
• [x] Ensured this PR contains a neat, self documenting set of commits.
• [ ] Updated any relevant documentation, examples, or release notes.
• [ ] Updated the dependencies in app.yaml to include any new role permissions.
• [ ] Updated the package resources documentation to include any new managed resources or classes.

[hasheddan]

@hongchaodeng I meant to mark this as draft as it has not been tested manually yet, but I will make sure to test and follow up if additional changes are needed

[hongchaodeng]

sure. This is a low risk refactoring PR.