Backport PR #3979 on branch 1.12.x (style: unify import messages)

[meeseeksmachine]

Backport PR #3979: style: unify import messages

[codecov]

Codecov Report

❌ Patch coverage is 10.52632% with 34 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.28%. Comparing base (253825d) to head (902fd03).
⚠️ Report is 1 commits behind head on 1.12.x.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/scanpy/queries/_queries.py	0.00%	4 Missing ⚠️
src/scanpy/external/exporting.py	0.00%	2 Missing ⚠️
src/scanpy/external/pp/_bbknn.py	0.00%	2 Missing ⚠️
src/scanpy/external/pp/_dca.py	0.00%	2 Missing ⚠️
src/scanpy/external/pp/_harmony_integrate.py	0.00%	2 Missing ⚠️
src/scanpy/external/pp/_magic.py	0.00%	2 Missing ⚠️
src/scanpy/external/pp/_mnn_correct.py	0.00%	2 Missing ⚠️
src/scanpy/external/pp/_scanorama_integrate.py	0.00%	2 Missing ⚠️
src/scanpy/external/tl/_harmony_timeseries.py	0.00%	2 Missing ⚠️
src/scanpy/external/tl/_palantir.py	33.33%	2 Missing ⚠️
... and 6 more

Additional details and impacted files

@@           Coverage Diff           @@
##           1.12.x    #3981   +/-   ##
=======================================
  Coverage   78.28%   78.28%           
=======================================
  Files         117      117           
  Lines       12634    12634           
=======================================
  Hits         9890     9890           
  Misses       2744     2744           

Flag	Coverage Δ
hatch-test.low-vers	77.56% <10.52%> (ø)
hatch-test.pre	77.22% <10.52%> (ø)

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

Files with missing lines	Coverage Δ
src/scanpy/metrics/_metrics.py	97.18% <ø> (ø)
src/scanpy/plotting/_utils.py	78.90% <100.00%> (ø)
src/scanpy/preprocessing/_scrublet/__init__.py	96.84% <ø> (ø)
src/scanpy/external/exporting.py	13.38% <0.00%> (ø)
src/scanpy/external/pp/_bbknn.py	53.84% <0.00%> (ø)
src/scanpy/external/pp/_dca.py	50.00% <0.00%> (ø)
src/scanpy/external/pp/_harmony_integrate.py	50.00% <0.00%> (ø)
src/scanpy/external/pp/_magic.py	26.19% <0.00%> (ø)
src/scanpy/external/pp/_mnn_correct.py	22.22% <0.00%> (ø)
src/scanpy/external/pp/_scanorama_integrate.py	27.58% <0.00%> (ø)
... and 9 more