Make german state field visible but not required

[senadir]

Germany state field was always set to hidden and optional, at some point later, states were added to it #31825, but the field was never marked as visible.

Shortcode checkout will always show the state fields if there are states, but checkout block won't, and would respect whatever is in locale settings. That's a separate debate for now #47317.

This PR only marks the state as visible, following other patterns done for other countries.

How to test the changes in this Pull Request:

1. In Checkout block, select Germany, make sure you can see german states list.
2. In Checkout shortcode, select Germany, make sure you can see german states list.

Changelog entry

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Significance

• Patch
• Minor
• Major

Type

• Fix - Fixes an existing bug
• Add - Adds functionality
• Update - Update existing functionality
• Dev - Development related task
• Tweak - A minor adjustment to the codebase
• Performance - Address performance issues
• Enhancement - Improvement to existing functionality

Message

Show Germany state field in Checkout block.

Comment

[github-actions]

Hi @opr,

Apart from reviewing the code changes, please make sure to review the testing instructions as well.

You can follow this guide to find out what good testing instructions should look like:
https://github.com/woocommerce/woocommerce/wiki/Writing-high-quality-testing-instructions

[github-actions]

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[opr]

Not sure why the CI hasn't added the changelog, maybe this needs to be closed and reopened to trigger?