Adapt connection string generation to support new formatting

[aaronpowell]

dotnet/aspire#11938 is going to introduce a new structure on how Aspire resources handle connection strings, so there's going to be a bit of work in the community toolkit to support this.

We will need to update all resources that generate connection strings to implement the new member from the interface, and return out the collection of parts rather than a constructed .NET-esq connection string.

[aaronpowell]

cc @sebastienros

[oising]

They're finally doing it, eh. Good stuff -- will you rev a major version for this? i.e. 10.x ?

[aaronpowell]

They're finally doing it, eh. Good stuff -- will you rev a major version for this? i.e. 10.x ?

Yep, it's coming as part of the next major release, and we'll have to rev to match it.