docs: add Import Data Assistant for Postgres version and region migration

[devin-ai-integration]

Add Import Data Assistant for Postgres version and region migration

This PR adds information about using the Import Data Assistant for Postgres version and region migration:

1. Adds an admonition to the Import Data Assistant documentation explaining that it can be used for Postgres version and region migration between Neon projects
2. Updates the "Migrate data from another Neon project" documentation to mention the Import Data Assistant as an option
3. Updates the "Upgrading your Postgres version" documentation to include the Import Data Assistant as a migration method

Changes

• Added a tip admonition to the Import Data Assistant documentation
• Updated migrate-from-neon.md to mention the Import Data Assistant
• Updated postgres-upgrade.md to include the Import Data Assistant as a migration method

Link to Devin run: https://app.devin.ai/sessions/f93c91eef5f14e3e8963d4e723276eab
Requested by: Daniel Price ([email protected])

[devin-ai-integration]

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Name	Status	Preview	Comments	Updated (UTC)
neon-next	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 22, 2025 1:21pm