Don't throw when getting context info for a bad connection

[ajcvickers]

Fixes #9244

[bricelam]

I seem to remember other commands throwing too:

• migrations add
• migrations list
• migrations remove --force
• migrations script

[ajcvickers]

@bricelam Do you remember any more specifics? I see these operations creating the context instance, but this should be fine. They don't seem to get the DbConnection directly. Are there any customer-reported issues I could look at?

[bricelam]

Don’t remember. It was a long tome ago, it may have gotten fixed by some other refactoring.