fix: Parquet format output not working in CLI for show commands

[Karribalu]

BREAKING CHANGE:
The short option -o, previously used for order-by in the table-list command, has been replaced and is now used for the output option.

Closes #25941

Describe your proposed changes here.

1. Mandated the -o or --output option when -format specified as Parquet
2. Updated the following commands with the same fix
   • show databases
   • show system table
   • show system table-list
   • show system summary

• I've read the contributing section of the project README.
• Signed CLA (if not already signed).

[hiltontj]

He @Karribalu - I have a couple of suggestions in line. I think the breaking change is okay given the prior discussion about it, and that this makes it consistent with other CLIs that output parquet.

[hiltontj]

It would be good to add a success test case that writes the parquet to a temp file, then reads it, and validates its contents.

Some helpful APIs that would enable that:

• We use the tempfile crate for temporary files in tests
• There are APIs for reading parquet files into Arrow RecordBatchs in the parquet crate
• There are helpers for visually asserting on the contents of those record batches in DataFusion, e.g., assert_batches_sorted_eq

[Karribalu]

Hello @hiltontj,
Apologies for the late reply.
I have added test cases for validating the parquet files using the resources you provided.
Please let me know if you have any comments.

[hiltontj]

@Karribalu - sorry that we have not followed up on this PR until now.

I will have to request some more changes in order to get this merged:

• It looks like you may need to merge main to get recent cargo-audit failures addressed.
• The BREAKING CHANGE needs to be removed from this PR. That means that the short option -o needs to be taken out, and this command can only use the long --output option. We cannot introduce a breaking change at this point.