Automatically try reloading failed images on network changes

[stefanceriu]

This PR exposes a new mechanism in the ImageProvider that can hold off image loading resolution until the connectivity is re-established. It automatically handles cancelling tasks when views get deallocated and will bail out if the second attempt fails while on a reachable connection to avoid retrying indefinitely.

It also refactors the MediaProvider tests and moves towards a generated mock MediaLoader.

[github-actions]

	Warnings
⚠️	Some of the commits are missing ticket numbers. Please consider squashing all commits that don't have a tracking number.
⚠️	You seem to have made changes to views. Please consider adding screenshots.

Generated by 🚫 Danger Swift against 42d2f5a

[codecov]

Codecov Report

Attention: Patch coverage is 88.77888% with 34 lines in your changes missing coverage. Please review.

Project coverage is 77.26%. Comparing base (cf35056) to head (42d2f5a).
Report is 2 commits behind head on develop.

Files	Patch %	Lines
...tX/Sources/Other/SwiftUI/Views/LoadableImage.swift	77.14%	8 Missing ⚠️
...ources/Services/Media/Provider/MediaProvider.swift	80.00%	8 Missing ⚠️
...sts/Sources/MediaProvider/MediaProviderTests.swift	95.16%	3 Missing ⚠️
...ens/InviteUsersScreen/View/InviteUsersScreen.swift	0.00%	2 Missing ⚠️
...ources/Services/UserSession/UserSessionStore.swift	0.00%	2 Missing ⚠️
NSE/Sources/Other/NSEUserSession.swift	0.00%	2 Missing ⚠️
.../FlowCoordinators/UserSessionFlowCoordinator.swift	0.00%	1 Missing ⚠️
...mentX/Sources/Other/Extensions/ClientBuilder.swift	0.00%	1 Missing ⚠️
...urces/Other/Pills/PillAttachmentViewProvider.swift	75.00%	1 Missing ⚠️
...alSearchScreen/GlobalSearchScreenCoordinator.swift	0.00%	1 Missing ⚠️
... and 5 more

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3170      +/-   ##
===========================================
- Coverage    77.33%   77.26%   -0.07%     
===========================================
  Files          717      717              
  Lines        56141    56247     +106     
===========================================
+ Hits         43415    43459      +44     
- Misses       12726    12788      +62     

Flag	Coverage Δ
unittests	68.39% <88.77%> (-0.08%)	⬇️

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[pixlwave]

Yeah this seems neat to me, let see what happens 😎

[sonarcloud]

Quality Gate failed

Failed conditions
36.6% Duplication on New Code (required ≤ 3%)

See analysis details on SonarCloud