imports: deprecate from pkg root [2/n] Detection

[Borda]

What does this PR do?

Part of #1681 (comment)

• class version
• functional
• tests

Before submitting

• Was this discussed/agreed via a Github issue? (no need for typos and docs improvements)
• Did you read the contributor guideline, Pull Request section?
• Did you make sure to update the docs?
• Did you write any new necessary tests?

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[codecov]

Codecov Report

Merging #1694 (a0705d6) into master (a8bafa2) will decrease coverage by 49%.
The diff coverage is 87%.

❗ Current head a0705d6 differs from pull request most recent head ceda635. Consider uploading reports for the commit ceda635 to get more accurate results

Additional details and impacted files

@@           Coverage Diff            @@
##           master   #1694     +/-   ##
========================================
- Coverage      89%     40%    -49%     
========================================
  Files         230     230             
  Lines       12860   12872     +12     
========================================
- Hits        11410    5117   -6293     
- Misses       1450    7755   +6305