chore(firestore): rename nameddb tests to enterprise

[wu-hui]

This PR renames the Firestore tests in the JS/Web SDK to use the term 'enterprise' instead of 'nameddb', aligning it with the naming conventions used in the Android and iOS SDKs.

• Renamed scripts in packages/firestore/package.json.
• Updated .github/workflows/test-changed-firestore.yml to reference the renamed scripts.
• Chrome-based tests (the required set) now use the enterprise name.
• Firefox and Webkit tests also use the enterprise name but remain non-blocking.

[changeset-bot]

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Latest commit: 71917e8

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[gemini-code-assist]

Code Review

This pull request renames several test scripts in packages/firestore/package.json, replacing the :nameddb suffix with :enterprise to better reflect their purpose. These changes are applied consistently across lite, browser, and node test configurations, as well as the aggregate test:all and test:all:ci scripts. I have no feedback to provide.