Unify migration descriptions

[delvh]

All migration descriptions now follow a unified naming approach.
Additionally, a Gitea migration now no longer asks whether to migrate Merge requests, but Pull Requests instead.
Fixes #16777.
Fixes #16782.

EDIT: I have just noticed that
Migrate data from <Provider.URL> or another <Provider> instance. can be used as well instead of
Migrate data from <Provider.URL> or other <Provider> instances.
Which one is preferred?

New appearance

Previous appearance

[codecov-commenter]

Codecov Report

Merging #16781 (e3f79f9) into main (e891d68) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main   #16781   +/-   ##
=======================================
  Coverage   45.48%   45.49%           
=======================================
  Files         762      762           
  Lines       85975    85969    -6     
=======================================
+ Hits        39106    39111    +5     
+ Misses      40555    40548    -7     
+ Partials     6314     6310    -4     

Impacted Files	Coverage Δ
models/index.go	49.05% <ø> (ø)
models/user.go	54.55% <100.00%> (+0.14%)	⬆️
modules/util/timer.go	42.85% <0.00%> (-42.86%)	⬇️
models/repo_list.go	77.64% <0.00%> (-0.79%)	⬇️
routers/api/v1/repo/pull.go	29.63% <0.00%> (+0.51%)	⬆️
modules/queue/workerpool.go	53.81% <0.00%> (+0.76%)	⬆️
modules/log/file.go	75.20% <0.00%> (+1.60%)	⬆️
modules/queue/manager.go	68.18% <0.00%> (+2.84%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b88dbe1...e3f79f9. Read the comment docs.

[delvh]

EDIT: I have just noticed that
Migrate data from <Provider.URL> or another <Provider> instance. can be used as well instead of
Migrate data from <Provider.URL> or other <Provider> instances.
Which one is preferred?

This question hasn't been answered yet.

[lunny]

EDIT: I have just noticed that
Migrate data from <Provider.URL> or another <Provider> instance. can be used as well instead of
Migrate data from <Provider.URL> or other <Provider> instances.
Which one is preferred?

This question hasn't been answered yet.

Hm, for me. Both OK.

[KN4CK3R]

I vote for 1.