[WIP] Refactor Hyperspace Index Configs to allow support for addition of new index

[thugsatbay]

What is the context for this pull request?

Refactor Hyperspace Index Configs to allow support for addition of new index. Like Bloom Filter or Partition Elimination Index.

• Tracking Issue: #341
• Parent Issue: NA
• Dependencies: NA

What changes were proposed in this pull request?

1. Separating Case and Builder classes of configs
2. Putting al builder in designated package
3. Having case classes in same class name as package name
4. Add a function in config that displays all index available in hyperspace

Does this PR introduce any user-facing change?

Yes, explained in proposed changes.

How was this patch tested?

TODO

[clee704]

Cleaning up old PRs - This PR is superseded by #443.