Publish bundle jsonschema.json as a release asset

[janniklasrose]

Summary

• Upload bundle/schema/jsonschema.json (the output of databricks bundle schema) as a GitHub release asset via goreleaser's release.extra_files.
• Motivation: we want to register the bundle JSON schema in SchemaStore pointing at a stable "latest" release URL (https://github.com/databricks/cli/releases/latest/download/jsonschema.json). Publishing as a release asset gives us that URL so SchemaStore doesn't need to be updated on every CLI release.

Test plan

• Verify goreleaser config parses (goreleaser check if available locally, otherwise rely on the release workflow).

% goreleaser check
  • checking                                  path=.goreleaser.yaml
  • 1 configuration file(s) validated
  • thanks for using GoReleaser!

• After the next tagged release, confirm jsonschema.json appears as a release asset and that https://github.com/databricks/cli/releases/latest/download/jsonschema.json resolves to it.

This pull request and its description were written by Isaac.

[github-actions]

Waiting for approval

Based on git history, these people are best suited to review:

• @pietern -- recent work in ./

Eligible reviewers: @andrewnester, @anton-107, @denik, @renaudhartert-db, @shreyas-goenka, @simonfaltum

_{Suggestions based on git history. See OWNERS for ownership rules.}