chore(types): Deprecate supported_identifiers and remove supported_external_accounts

[panteliselef]

Description

Neither are used in their respective classes and supported_external_accounts is not inside /environment response

Checklist

• npm test runs as expected.
• npm run build runs as expected.
• (If applicable) JSDoc comments have been added or updated for any package exports
• (If applicable) Documentation has been updated

Type of change

• 🐛 Bug fix
• 🌟 New feature
• 🔨 Breaking change
• 📖 Refactoring / dependency upgrade / documentation
• other:

[changeset-bot]

🦋 Changeset detected

Latest commit: a237eac

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 12 packages

Name	Type
@clerk/clerk-js	Minor
@clerk/types	Minor
@clerk/chrome-extension	Patch
@clerk/clerk-expo	Patch
@clerk/backend	Patch
@clerk/fastify	Patch
gatsby-plugin-clerk	Patch
@clerk/nextjs	Patch
@clerk/clerk-react	Patch
@clerk/remix	Patch
@clerk/clerk-sdk-node	Patch
@clerk/themes	Patch

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[dimkl]

We should add those changes in the migration guide and the cli.
cc: @LekoArts , @jescalan