sql: report the error seen during async operation in status directly

[muvaf]

Description of your changes

Report the error seen during async operation in status directly since the update operation is renewed immediately if it hits an error.

Fixes #84

I have a few test cases I'd like to do, so, it's not ready to merge yet.

Checklist

I have:

• [ ] Run make reviewable to ensure this PR is ready for review.
• [ ] 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.

[hasheddan]

@muvaf just wanted to give you a heads up that I am going to open a PR for pinning master to crossplane v0.6.0 so that we can cherry-pick backport to stack-azure v0.4.0 release branch