Support for in-memory file format tables

[Jefffrey]

Is your feature request related to a problem or challenge?

There's been a few questions over in discussions about reading csv/json/parquet files from memory instead of from disk/object store:

• How can i load parquet data from memory? #3223
• How to read a JSON or CSV document from memory? #6963
• Load parquet from memory? #18010

Describe the solution you'd like

Consider implementing support for this within DataFusion.

Describe alternatives you've considered

If prefer not to have this within DataFusion itself, create a datafusion-example demonstrating this that can be used as reference.

Additional context

#6963 (comment)

[alamb]

I think showing how to use a Memory object store would be a good first start

Basically register an in memory object store and then read from those

Here is a test that does so: https://github.com/apache/datafusion/blob/28755b1d7eb5222a8f5fb5417134dd6865ac1311/datafusion/core/tests/datasource/object_store_access.rs#L454-L453