Add full blob batch data

[darth-cy]

Description

• Add a batch data test vector that produces a full blob.
• This test should pass after blob len check fix in PR1373 is merged.

Type of change

• Add test vector that covers an edge case.

[roynalnaruto]

@darth-cy approving and merging for now.

However, something to note:
In the future, we may make changes to the zstd encoder configs (for instance, increasing the window log for better compression ratio). When such changes happen, "batch274" will not encode down to exactly 126976 bytes.

I think we must add some kind of an assertion just for this test (probably separate it out into its own unit test), to assert that the blob data config does in fact have 126976 bytes post encoding.