MBL-586: Unify rewards selection viewModels

[Arkariang]

📲 What

• After reunifying checkout flows, for Rewards Carousel selection we were just using compose UI, but kept the old viewModel, in this PR we've extended LatePledges RewardSelectionViewModel to be able to support crowdfund as well, adding:
• • Alert shown during update pledge flow when user selecting a different reward and had backed add Ons
• • Analytics events
• • Obtain PledgeData to navigate to forward screens during crowdfund flow.
• • No more RXJava on Rewards Screens

🤔 Why

• Unify checkout flows with new UI/architecture patterns

👀 See

• Update pledge dialog

ShowAlertWhenUpdatingPledge.mp4

• Late pledge keeps working as usual

LatePledgesNotShowsAlert.mp4

| --- | --- |
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📋 QA

• Pledge to a reward + addOns (no alert dialog should appear), update that pledge selecting a different reward, an alert dialog should appear, be able to navigate forward to addOns screen.
• Pledge to a late pledges project, no alert dialog should appear

Story 📖

NMBL-1586

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 67.64706% with 11 lines in your changes missing coverage. Please review.

Project coverage is 67.77%. Comparing base (37f062f) to head (61065d0).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...iewmodels/projectpage/RewardsSelectionViewModel.kt	67.64%	3 Missing and 8 partials ⚠️

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Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2133      +/-   ##
============================================
- Coverage     67.77%   67.77%   -0.01%     
- Complexity     2227     2233       +6     
============================================
  Files           368      368              
  Lines         22852    22881      +29     
  Branches       3283     3294      +11     
============================================
+ Hits          15489    15508      +19     
- Misses         5597     5600       +3     
- Partials       1766     1773       +7     

Flag	Coverage Δ
	67.77% <67.64%> (-0.01%)	⬇️

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