Prepare for trusted publishing

[simolus3]

This:

• Updates the Node version we use for tests to v22 (v20 will become unsupported soon).
• Adopts corepack for managing the pnpm version.
• Uses dependency caching from actions/setup-node instead of the custom pnpm cache.
• Merges the dev and prod publishing workflows into a single workflow (npm will only let us do trusted publishing from a single workflow).
• Stops passing the NPM token, instead using trusted publishing.

[changeset-bot]

🦋 Changeset detected

Latest commit: e6cf14a

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

This PR includes changesets to release 13 packages

Name	Type
@powersync/adapter-sql-js	Patch
@powersync/attachments	Patch
@powersync/common	Patch
@powersync/drizzle-driver	Patch
@powersync/kysely-driver	Patch
@powersync/node	Patch
@powersync/op-sqlite	Patch
@powersync/react	Patch
@powersync/react-native	Patch
@powersync/tanstack-react-query	Patch
@powersync/vue	Patch
@powersync/web	Patch
@powersync/diagnostics-app	Patch

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[simolus3]

Closing in favor of #841