Fix partial text messages not being saved for each room with RTE enabled

[aringenbach]

Fixes #7535

Also updates the RTE library version to 2.1.0 and apply API changes. See CHANGELOG for details.

Simulator.Screen.Recording.-.iPhone.SE.3rd.generation.-.2023-05-03.at.14.51.09.mp4

[nimau]

LGTM

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

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[codecov]

Codecov Report

Patch coverage: 3.84% and project coverage change: -0.01 ⚠️

Comparison is base (379e8e2) 12.22% compared to head (5559e1c) 12.22%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #7536      +/-   ##
===========================================
- Coverage    12.22%   12.22%   -0.01%     
===========================================
  Files         1646     1646              
  Lines       163363   163408      +45     
  Branches     67063    67079      +16     
===========================================
+ Hits         19968    19971       +3     
- Misses      142752   142794      +42     
  Partials       643      643              

Flag	Coverage Δ
uitests	55.06% <100.00%> (ø)
unittests	6.06% <0.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...t/Views/RoomInputToolbar/MXKRoomInputToolbarView.m	0.00% <0.00%> (ø)
Riot/Modules/Room/MXKRoomViewController.m	0.00% <0.00%> (ø)
Riot/Modules/Room/RoomViewController.m	0.00% <0.00%> (ø)
.../WYSIWYGInputToolbar/WysiwygInputToolbarView.swift	0.00% <0.00%> (ø)
...LinkAction/MockComposerLinkActionScreenState.swift	100.00% <100.00%> (ø)
...Action/ViewModel/ComposerLinkActionViewModel.swift	41.17% <100.00%> (ø)

... and 2 files with indirect coverage changes

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