refactor: drop mls::conversation::export module [WPB-15585]

[SimonThormeyer]

What's new in this PR

See title

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PR Submission Checklist for internal contributors

• The PR Title
  • conforms to the style of semantic commits messages¹ supported in Wire's Github Workflow²
  • contains a reference JIRA issue number like SQPIT-764
  • answers the question: If merged, this PR will: ... ³

1. https://sparkbox.com/foundry/semantic_commit_messages
2. https://github.com/wireapp/.github#usage
3. E.g. feat(conversation-list): Sort conversations by most emojis in the title #SQPIT-764.

[github-actions]

Bencher Report

Branch	simon/refactor/refactor-conversation-WPB-15585
Testbed	ubuntu-latest

Click to view all benchmark results

Benchmark	Latency	milliseconds (ms)
Commit add f(group size)/cs1/mem/1002	📈 view plot 🚷 view threshold	18.79 ms
Commit add f(group size)/cs1/mem/2	📈 view plot 🚷 view threshold	6.93 ms
Commit add f(group size)/cs1/mem/202	📈 view plot 🚷 view threshold	9.45 ms
Commit add f(group size)/cs1/mem/402	📈 view plot 🚷 view threshold	12.01 ms
Commit add f(group size)/cs1/mem/602	📈 view plot 🚷 view threshold	14.95 ms
Commit add f(group size)/cs1/mem/802	📈 view plot 🚷 view threshold	17.05 ms
Commit add f(number clients)/cs1/mem/1002	📈 view plot 🚷 view threshold	981.54 ms
Commit add f(number clients)/cs1/mem/2	📈 view plot 🚷 view threshold	6.79 ms
Commit add f(number clients)/cs1/mem/202	📈 view plot 🚷 view threshold	84.65 ms
Commit add f(number clients)/cs1/mem/402	📈 view plot 🚷 view threshold	219.45 ms
Commit add f(number clients)/cs1/mem/602	📈 view plot 🚷 view threshold	428.97 ms
Commit add f(number clients)/cs1/mem/802	📈 view plot 🚷 view threshold	668.39 ms
Commit pending proposals f(group size)/cs1/mem/1002	📈 view plot 🚷 view threshold	116.13 ms
Commit pending proposals f(group size)/cs1/mem/2	📈 view plot 🚷 view threshold	28.21 ms
Commit pending proposals f(group size)/cs1/mem/202	📈 view plot 🚷 view threshold	45.71 ms
Commit pending proposals f(group size)/cs1/mem/402	📈 view plot 🚷 view threshold	60.71 ms
Commit pending proposals f(group size)/cs1/mem/602	📈 view plot 🚷 view threshold	79.18 ms
Commit pending proposals f(group size)/cs1/mem/802	📈 view plot 🚷 view threshold	94.37 ms
Commit pending proposals f(pending size)/cs1/mem/1	📈 view plot 🚷 view threshold	18.67 ms
Commit pending proposals f(pending size)/cs1/mem/101	📈 view plot 🚷 view threshold	114.82 ms
Commit pending proposals f(pending size)/cs1/mem/21	📈 view plot 🚷 view threshold	35.88 ms
Commit pending proposals f(pending size)/cs1/mem/41	📈 view plot 🚷 view threshold	56.57 ms
Commit pending proposals f(pending size)/cs1/mem/61	📈 view plot 🚷 view threshold	75.36 ms
Commit pending proposals f(pending size)/cs1/mem/81	📈 view plot 🚷 view threshold	95.07 ms
Commit remove f(group size)/cs1/mem/1002	📈 view plot 🚷 view threshold	27.56 ms
Commit remove f(group size)/cs1/mem/2	📈 view plot 🚷 view threshold	6.86 ms
Commit remove f(group size)/cs1/mem/202	📈 view plot 🚷 view threshold	8.98 ms
Commit remove f(group size)/cs1/mem/402	📈 view plot 🚷 view threshold	11.84 ms
Commit remove f(group size)/cs1/mem/602	📈 view plot 🚷 view threshold	17.50 ms
Commit remove f(group size)/cs1/mem/802	📈 view plot 🚷 view threshold	21.73 ms
Commit remove f(number clients)/cs1/mem/1002	📈 view plot 🚷 view threshold	30.57 ms
Commit remove f(number clients)/cs1/mem/2	📈 view plot 🚷 view threshold	136.52 ms
Commit remove f(number clients)/cs1/mem/202	📈 view plot 🚷 view threshold	115.97 ms
Commit remove f(number clients)/cs1/mem/402	📈 view plot 🚷 view threshold	93.57 ms
Commit remove f(number clients)/cs1/mem/602	📈 view plot 🚷 view threshold	71.53 ms
Commit remove f(number clients)/cs1/mem/802	📈 view plot 🚷 view threshold	50.74 ms
Commit update f(group size)/cs1/mem/1002	📈 view plot 🚷 view threshold	135.89 ms
Commit update f(group size)/cs1/mem/2	📈 view plot 🚷 view threshold	6.90 ms
Commit update f(group size)/cs1/mem/202	📈 view plot 🚷 view threshold	33.30 ms
Commit update f(group size)/cs1/mem/402	📈 view plot 🚷 view threshold	59.08 ms
Commit update f(group size)/cs1/mem/602	📈 view plot 🚷 view threshold	85.73 ms
Commit update f(group size)/cs1/mem/802	📈 view plot 🚷 view threshold	110.81 ms

🐰 View full continuous benchmarking report in Bencher

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 96.59091% with 3 lines in your changes missing coverage. Please review.

Project coverage is 79.86%. Comparing base (516f701) to head (befb1c5).

Files with missing lines	Patch %	Lines
crypto/src/mls/conversation/mod.rs	96.59%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #947      +/-   ##
==========================================
+ Coverage   79.76%   79.86%   +0.09%     
==========================================
  Files         114      113       -1     
  Lines       21056    21045      -11     
==========================================
+ Hits        16796    16807      +11     
+ Misses       4260     4238      -22     

Files with missing lines	Coverage Δ
crypto/src/mls/conversation/mod.rs	94.54% <96.59%> (+0.53%)	⬆️

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[SimonThormeyer]

Will be done in #948