feat(memory): add option to disable personal and project TM contribution

[amCap1712]

Introduce contribute_personal_tm for user profiles and contribute_project_tm for components, to enable selective contribution to translation memory. If contribute_personal_tm is disabled, the user's translation memory is not updated. If contribute_project_tm is disabled for a component, the associated project's translation memory is not updated.

Question: Should the shared instance memory also be not updated when the contribute_project_tm is disabled for a component?

[nijel]

Should the shared instance memory also be not updated when the contribute_project_tm is disabled for a component?

Yes, it makes sense to make it as opt out from the translation memory.

On the other side, I think user setting should influence only the user translation memory (what your correctly did).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.15%. Comparing base (c4a0a54) to head (66bfefa).
⚠️ Report is 3024 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #15011   +/-   ##
=======================================
  Coverage   91.15%   91.15%           
=======================================
  Files         626      628    +2     
  Lines       65444    65506   +62     
  Branches     6755     6752    -3     
=======================================
+ Hits        59653    59713   +60     
- Misses       4063     4065    +2     
  Partials     1728     1728           

Files with missing lines	Coverage Δ
weblate/accounts/forms.py	89.27% <ø> (ø)
.../migrations/0017_profile_contribute_personal_tm.py	100.00% <100.00%> (ø)
weblate/accounts/models.py	86.77% <100.00%> (+0.03%)	⬆️
weblate/memory/tasks.py	100.00% <100.00%> (+5.17%)	⬆️
weblate/memory/tests.py	100.00% <100.00%> (ø)
weblate/trans/forms.py	89.94% <ø> (+0.10%)	⬆️
...migrations/0037_component_contribute_project_tm.py	100.00% <100.00%> (ø)
weblate/trans/models/component.py	81.55% <100.00%> (+0.05%)	⬆️

... and 21 files with indirect coverage changes

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[nijel]

Merged, thanks for your contribution!