perf(dx): let developers know that they need to enable index on links

[barredterra]

For DocTypes linked on a dashboard, get_open_count() and (via click) the list view filtered by this link will be called many times. Hence, indexing likely pays off.

[codecov]

Codecov Report

Merging #21745 (9a3eef3) into develop (d1c3877) will increase coverage by 2.16%.
The diff coverage is 100.00%.

❗ Current head 9a3eef3 differs from pull request most recent head c83b8b2. Consider uploading reports for the commit c83b8b2 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #21745      +/-   ##
===========================================
+ Coverage    61.88%   64.05%   +2.16%     
===========================================
  Files          765      763       -2     
  Lines        72988    69526    -3462     
  Branches      6292     6281      -11     
===========================================
- Hits         45170    44536     -634     
+ Misses       24275    21455    -2820     
+ Partials      3543     3535       -8     

Flag	Coverage Δ
server	69.14% <100.00%> (+3.88%)	⬆️

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[stale]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed within 3 days if no further activity occurs, but it only takes a comment to keep a contribution alive :) Also, even if it is closed, you can always reopen the PR when you're ready. Thank you for contributing.

[ankush]

I ran this and it enabled way too many indexes (not a lot of them required indexing 🥴 ), we need a better solution for all link/dynamic link indexing 😔

For now I've made this a nudge to developer, they can enable it if required.