Remove WordPress uninstall card from Jetpack dashboard

[jkmassel]

Summary

• Removes the "Welcome to the Jetpack app. You can uninstall the WordPress app" dashboard card that was incorrectly shown in Jetpack even when WordPress was not installed
• Removes the associated "Please Delete WordPress" screen, navigation action, analytics tracking, drawables, and translated strings
• Adds a 9-param merge() overload to LiveDataUtils (needed after removing the migration card source from the 10-source dashboard merge)

Fixes: CMM-2004

Test plan

• Install Jetpack debug build and verify the uninstall card no longer appears on the dashboard
• Verify the migration flow (Welcome → Notifications → Done) still works when triggered from a fresh Jetpack install
• Verify no build warnings or test failures

🤖 Generated with Claude Code

[dangermattic]

	1 Warning
⚠️	This PR is larger than 300 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.

	1 Message
📖	This PR is still a Draft: some checks will be skipped.

Generated by 🚫 Danger

[wpmobilebot]

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

	App Name	Jetpack Android
	Build Type	Debug
	Version	pr22761-d5fb601
	Build Number	1488
	Application ID	com.jetpack.android.prealpha
	Commit	d5fb601
	Installation URL	6dml9isbvvrfo

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

[wpmobilebot]

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

	App Name	WordPress Android
	Build Type	Debug
	Version	pr22761-d5fb601
	Build Number	1488
	Application ID	org.wordpress.android.prealpha
	Commit	d5fb601
	Installation URL	70n53ong2fc78

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

[codecov]

Codecov Report

❌ Patch coverage is 65.38462% with 18 lines in your changes missing coverage. Please review.
✅ Project coverage is 37.36%. Comparing base (8c0b6d4) to head (d5fb601).

Files with missing lines	Patch %	Lines
...n/java/org/wordpress/android/util/LiveDataUtils.kt	65.38%	0 Missing and 18 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            trunk   #22761      +/-   ##
==========================================
- Coverage   37.40%   37.36%   -0.04%     
==========================================
  Files        2320     2319       -1     
  Lines      123674   123662      -12     
  Branches    16791    16804      +13     
==========================================
- Hits        46256    46207      -49     
- Misses      73707    73727      +20     
- Partials     3711     3728      +17     

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