[Wear App] Remove NavController injection from all Wear ViewModels

[ThomazFB]

Summary

Removes from the Wear app architectural design the practice of injecting the NavController into every VIewModel with a navigation action. This is not recommended due to the fact that the UI grants a NavController, and when the screen is destroyed, the NavController reference will also be lost.

This PR fixes it by keeping all NavControllers inside the Composables. The result is a simpler way to create the Wear ViewModels, without the need of using assisted injections.

How to Test

Make sure all screens with navigations (Login and Order List) are still working, even during configuration changes

Update release notes:

• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

Reviewer (or Author, in the case of optional code reviews):

Please make sure these conditions are met before approving the PR, or request changes if the PR needs improvement:

• The PR is small and has a clear, single focus, or a valid explanation is provided in the description. If needed, please request to split it into smaller PRs.
• Ensure Adequate Unit Test Coverage: The changes are reasonably covered by unit tests or an explanation is provided in the PR description.
• Manual Testing: The author listed all the tests they ran, including smoke tests when needed (e.g., for refactorings). The reviewer confirmed that the PR works as expected on big (tablet) and small (phone) in case of UI changes, and no regressions are added.

[dangermattic]

	1 Warning
⚠️	This PR is assigned to the milestone 20.6. This milestone is due in less than 2 days. Please make sure to get it merged by then or assign it to a milestone with a later deadline.

Generated by 🚫 Danger

[wpmobilebot]

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

	App Name	WooCommerce Android
	Platform	📱 Mobile
	Flavor	Jalapeno
	Build Type	Debug
	Commit	5a2eaa8
	Direct Download	woocommerce-prototype-build-pr12639-5a2eaa8.apk

[wpmobilebot]

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

	App Name	WooCommerce-Wear Android
	Platform	⌚️ Wear OS
	Flavor	Jalapeno
	Build Type	Debug
	Commit	5a2eaa8
	Direct Download	woocommerce-wear-prototype-build-pr12639-5a2eaa8.apk

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 66.66667% with 4 lines in your changes missing coverage. Please review.

Project coverage is 40.58%. Comparing base (413617c) to head (5a2eaa8).
Report is 15 commits behind head on trunk.

Files with missing lines	Patch %	Lines
...java/com/woocommerce/android/wear/ui/Navigation.kt	0.00%	2 Missing ⚠️
...woocommerce/android/wear/ui/login/FetchSiteData.kt	0.00%	1 Missing ⚠️
...android/wear/ui/orders/list/OrdersListViewModel.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##              trunk   #12639   +/-   ##
=========================================
  Coverage     40.58%   40.58%           
  Complexity     5699     5699           
=========================================
  Files          1232     1232           
  Lines         69413    69397   -16     
  Branches       9617     9617           
=========================================
- Hits          28170    28164    -6     
+ Misses        38651    38642    -9     
+ Partials       2592     2591    -1     

Flag	Coverage Δ
	40.58% <66.66%> (+<0.01%)	⬆️

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