feat: new action export to csv for selection

[emigun]

Description

New action: a selection of datasets can be exported to CSV using the user's saved column settings or default columns.

New function translateComponentLabel to be able to get header names in the same way as the pipe without duplicating code.

Motivation

There already exists a "Save data" -> CSV in the table, this however only export the visible datasets. With this new functionality, a user can select datasets from different views, add them to "Selection" and then export.

Tests included

• Included for each change/fix?
• Passing? (Merge will not be approved unless this is checked)

Summary by Sourcery

Add CSV export action for dataset selections using configured or default columns and shared translation logic for column headers.

New Features:

• Allow users to export the current dataset selection to CSV from the batch view using saved or default column configurations.

Enhancements:

• Introduce shared translateComponentLabel helper to reuse component-based translation logic outside the translation pipe.
• Ensure dataset column configuration falls back to default settings when user-specific settings are unavailable.
• Trigger instrument fetching on batch view initialization to support CSV export formatting and related functionality.
• Hide the CSV export action when editing a published dataset list to avoid invalid operations.

Tests:

• Extend batch view component tests to cover CSV export behavior, column resolution and translation, and export button visibility in the template.

[sourcery-ai]

Hey - I've reviewed your changes and they look great!

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