Stats Insights: Optimize table view updates by integrating diffable data source

[staskus]

Use a diffable data source within Stats Insights to make table view cell reloads more efficient. More information about implementation in: https://github.com/wordpress-mobile/WordPress-iOS/pull/22542

To test:

1. Open Stats Insights
2. Confirm data loads correctly without flickering

Regression Notes

1. Potential unintended areas of impact

Breaking loading of data within existing Stats Insights.

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

• Manual testing
• SiteStatsInsightsViewModelTests should still succeed

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

PR submission checklist:

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

Testing checklist:

• [ ] 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)

[dangermattic]

	1 Warning
:warning:	This PR is larger than 500 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.

Generated by :no_entry_sign: Danger

[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	pr22592-3c87ba7
	Version	24.6
	Bundle ID	com.jetpack.alpha
	Commit	3c87ba7cb5e3609c49150a5b4bc4e66533477f95
	App Center Build	jetpack-installable-builds #8456

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	pr22592-3c87ba7
	Version	24.6
	Bundle ID	org.wordpress.alpha
	Commit	3c87ba7cb5e3609c49150a5b4bc4e66533477f95
	App Center Build	WPiOS - One-Offs #9413

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

[peril-wordpress-mobile[bot]]

	Warnings
:warning:	PR has more than 500 lines of code changing. Consider splitting into smaller PRs if possible.

Generated by :no_entry_sign: dangerJS

[staskus]

@guarani review for this can wait after we're done with Traffic tab.

[staskus]

I added Stats Insights Details support in this PR. Stats Period Details is implemented in https://github.com/wordpress-mobile/WordPress-iOS/pull/22823.

These two PRs should cover diffable data source support for all the Stats.

[guarani]

Related to the failing CI checks: https://a8c.slack.com/archives/C05N140C8H5/p1710357494940709

[guarani]

I moved this to a new GitHub project, more context here: p1710464002701159-slack-C06BR07TJHK

[staskus]

TODO: Requires the same fix https://github.com/wordpress-mobile/WordPress-iOS/pull/22857

Done: