Blogging Prompts: use cached prompts for compact card and prompts list

[ScoutHarris]

Ref: #18429

This updates the FAB header prompt and the Prompts List to use cached prompts if available.

To easily confirm which prompts are used, messages are logged when cached prompts are used and when prompts are fetched from remote. These will be removed before merging.

To test:

• Start with a fresh install to purge any cached prompts.
• Enable bloggingPrompts feature flag.
• When the app first launches, the FAB gets a prompt. Verify this is logged: 🔴 todaysPrompt > fetching..
• Navigate away from and back to My Site. The FAB once again needs a prompt. Verify this is logged: 🔴 todaysPrompt > returning local.. (If you're on the Dashboard, you may see this twice - for the FAB and for the dashboard card.)
• Go to the Prompts List. Verify:
  • 🔴 listPrompts > fetching. is logged.
  • The loading view is displayed. (The table can be seen behind the loading view. I'll address that separately.)
  • 11 prompts are displayed once loaded.
• Navigate away from and back to the Prompts List. Verify:
  • 🔴 listPrompts > returning local. is logged.
  • The loading view may not display since this is a quick action.
  • 11 prompts are displayed.

Regression Notes

1. Potential unintended areas of impact
   N/A

2. What I did to test those areas of impact (or what existing automated tests I relied on)
   N/A

3. What automated tests I added (or what prevented me from doing so)
   N/A

PR submission checklist:

• I have completed the Regression Notes.
• I have considered adding unit tests for my changes.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

[wpmobilebot]

You can test the changes in WordPress from this Pull Request by:

• Clicking here or scanning the QR code below to access App Center
• Then installing the build number pr18658-23679f2 on your iPhone

If you need access to App Center, please ask a maintainer to add you.

[wpmobilebot]

You can test the changes in Jetpack from this Pull Request by:

• Clicking here or scanning the QR code below to access App Center
• Then installing the build number pr18658-23679f2 on your iPhone

If you need access to App Center, please ask a maintainer to add you.

[wargcm]

Looks good!

[ScoutHarris]

Thanks @wargcm !