feat(tree-explorer): sort dbs in the tree by name

[Anemy]

Looks like we were defaulting to the server's returned ordering, this pr makes the databases in the list sorted. While most of the databases returned from MongoDB are already sorted, admin, local, and config appear before others alphabetically. These changes make those databases appear alphabetically as well as ensures databases that might return databases differently, (maybe Atlas Data Federation or Cosmos), order the same.

Reported in #485

Before merging I'll add a test.
^ Just read this after merging 🙈 will open a new pr.

[lerouxb]

Do we want this? Feels right to me that the "system" dbs are listed first or at least separately without being mixed in with the others. Might be worth bringing up with product/design.