Alerts manager when a path has draft True

[numahell]

Add setting ALERT_DRAFT which send mail whenever a path has been changed to draft (#2904)

[cypress]

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Test summary

22 • 0 • 0 • 0

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Run details

Project	Geotrek-admin
Status	Passed
Commit	6f35578 ℹ️
Started	Aug 2, 2022 8:18 AM
Ended	Aug 2, 2022 8:22 AM
Duration	03:47 💡
OS	Linux Ubuntu - 20.04
Browser	Electron 94

View run in Cypress Dashboard ➡️

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[codecov]

Codecov Report

Merging #3195 (90e82f1) into master (bc86f93) will decrease coverage by 0.00%.
The diff coverage is n/a.

❗ Current head 90e82f1 differs from pull request most recent head d0cd703. Consider uploading reports for the commit d0cd703 to get more accurate results

@@            Coverage Diff             @@
##           master    #3195      +/-   ##
==========================================
- Coverage   97.92%   97.91%   -0.01%     
==========================================
  Files         273      273              
  Lines       19190    19121      -69     
==========================================
- Hits        18791    18722      -69     
  Misses        399      399              

Impacted Files	Coverage Δ
geotrek/core/forms.py	94.73% <0.00%> (-0.82%)	⬇️
geotrek/core/models.py	96.31% <0.00%> (-0.21%)	⬇️
geotrek/core/views.py	99.32% <0.00%> (-0.02%)	⬇️
geotrek/core/admin.py	100.00% <0.00%> (ø)
geotrek/core/filters.py	100.00% <0.00%> (ø)

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