Reader: Add analytics for the tags stream

[dvdchr]

Part of #23069
Internal ref pctCYC-1lG-p2

This PR adds tracking for the tags stream:

• New events
  • reader_tags_feed_shown — this is tracked upon opening the 'Your Tags' stream.
  • reader_tags_feed_more_from_tag_tapped — tracked when tapping the 'More' cell at the end of a tag post list.
  • reader_tags_feed_header_tapped — tracked when tapping the tag headers in the tags stream.
• Added source: tags_feed parameter to
  • reader_article_liked
  • reader_article_unliked
  • reader_blog_previewed
  • reader_tag_loaded
  • reader_post_card_tapped
• Added type: site|topic to reader_filter_sheet_cleared
• Tracked post_card_more_tapped when the ellipsis menu of the post card is tapped in the tags stream.

To test

• Launch the Jetpack app.
• Go to the Reader tab, and switch to the 'Your Tags' stream.
  • 🔎 Verify 🔵 Tracked: reader_dropdown_menu_item_tapped <id: tags> appears.
  • 🔎 Verify 🔵 Tracked: reader_tags_feed_shown appears.
• Tap one of the posts.
  • 🔎 Verify 🔵 Tracked: reader_post_card_tapped <source: tags_feed> appears.
  • Go back, and tap the site title of any post.
  • 🔎 Verify 🔵 Tracked: reader_blog_previewed <source: tags_feed> appears.
• Go back, and like one of the posts.
  • 🔎 Verify 🔵 Tracked: reader_article_liked <source: tags_feed> appears.
• Unlike the same post.
  • 🔎 Verify 🔵 Tracked: reader_article_unliked <source: tags_feed> appears.
• Tap the ellipsis menu on any post.
  • 🔎 Verify 🔵 Tracked: post_card_more_tapped appears.
• Do a smoke test by tapping one of the context menu items.
  • For example, if you tap Visit, verify that 🔵 Tracked: reader_article_visited appears.
• Go back to the tag stream.
• Tap one of the tag button/header.
  • 🔎 Verify 🔵 Tracked: reader_tags_feed_header_tapped appears.
  • 🔎 Verify 🔵 Tracked: reader_tag_loaded <source: tags_feed> appears.
• Go back.
• Scroll to the end of a post list of any tag, and tap the 'More' button.
  • 🔎 Verify 🔵 Tracked: reader_tags_feed_more_from_tag_tapped appears.
  • 🔎 Verify 🔵 Tracked: reader_tag_loaded <source: tags_feed> appears.
• Go back.
• Filter the stream by any tag.
• Tap 'X' to remove the filter.
  • 🔎 Verify 🔵 Tracked: reader_filter_sheet_cleared <type: topic> appears.

Testing reader_filter_sheet_cleared in the Subscriptions stream

Regression Notes

1. Potential unintended areas of impact
   Should be none.

2. What I did to test those areas of impact (or what existing automated tests I relied on)
   Manually tested the changes.

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.

Testing checklist:
N/A. Not a user-facing change.

• WordPress.com sites and self-hosted Jetpack sites.
• Portrait and landscape orientations.
• Light and dark modes.
• Fonts: Larger, smaller and bold text.
• High contrast.
• VoiceOver.
• Languages with large words or with letters/accents not frequently used in English.
• Right-to-left languages. (Even if translation isn’t complete, formatting should still respect the right-to-left layout)
• iPhone and iPad.
• Multi-tasking: Split view and Slide over. (iPad)

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack Alpha by scanning the QR code below to install the corresponding build.

	App Name	Jetpack Alpha
	Configuration	Release-Alpha
	Build Number	pr23214-a7da54a
	Version	24.9
	Bundle ID	com.jetpack.alpha
	Commit	a7da54a
	App Center Build	jetpack-installable-builds #8971

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress Alpha by scanning the QR code below to install the corresponding build.

	App Name	WordPress Alpha
	Configuration	Release-Alpha
	Build Number	pr23214-a7da54a
	Version	24.9
	Bundle ID	org.wordpress.alpha
	Commit	a7da54a
	App Center Build	WPiOS - One-Offs #9922

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[wargcm]

LGTM! 🎉