Podcast Player: Show error from API

[marekhrabe]

Fixes #17496

Changes proposed in this Pull Request:

• Surface errors from the Podcast Player API - they contain useful context of the exact error.
• Only use the generic error as a fallback

Jetpack product discussion

—

Does this pull request change what data or activity we track or use?

no

Testing instructions:

• Test for example with an empty feed
• or force the API error like I did:
  • at the top of the method get_player_data in _inc/lib/class-jetpack-podcast-helper.php,
  • return new WP_Error( 'err_code', __( 'Custom error message', 'jetpack' ) );

Proposed changelog entry for your changes:

• More helpful error messages in the Podcast Player block

[matticbot]

Caution: This PR has changes that must be merged to WordPress.com
Hello marekhrabe! These changes need to be synced to WordPress.com - If you 're an a11n, please commandeer and confirm D51472-code works as expected before merging this PR. Once this PR is merged, please commit the changes to WP.com. Thank you!
This revision will be updated with each commit to this PR

[jetpackbot]

	Warnings
⚠️	The PR is missing at least one [Status] label. Suggestions: [Status] In Progress, [Status] Needs Review

E2E results is available here (for debugging purposes): https://jetpack-e2e-dashboard.herokuapp.com/pr-17537

This is an automated check which relies on PULL_REQUEST_TEMPLATE. We encourage you to follow that template as it helps Jetpack maintainers do their job. If you think 'Testing instructions' or 'Proposed changelog entry' are not needed for your PR - please explain why you think so. Thanks for cooperation 🤖

Generated by 🚫 dangerJS against d880cea

[cpapazoglou]

Tested with an empty podcast https://anchor.fm/s/3b4e47ac/podcast/rss and it surfaced the error correctly

[obenland]

r218369-wpcom