feat(chartcuterie): Revert the revert of refactory

[sentaur-athena]

#71786 broke in canary so I reverted it. This PR reverts the revert, fixes the issue and adds test for it.

[sentaur-athena]

This was the issue that broke the canary. I didn't define the image_url before.

[sentaur-athena]

And therefore if it wasn't part of the supported issues it would throw an error so adding unsupported issue here to the test. https://sentry.sentry.io/issues/5434963970/

[codecov]

Codecov Report

Attention: Patch coverage is 88.70968% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 77.90%. Comparing base (d92153e) to head (1c5aba2).
Report is 87 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #71885   +/-   ##
=======================================
  Coverage   77.90%   77.90%           
=======================================
  Files        6555     6557    +2     
  Lines      292198   292268   +70     
  Branches    50475    50485   +10     
=======================================
+ Hits       227633   227698   +65     
- Misses      58312    58315    +3     
- Partials     6253     6255    +2     

Files	Coverage Δ
...tions/slack/message_builder/image_block_builder.py	100.00% <100.00%> (+21.05%)	⬆️
...c/sentry/integrations/issue_alert_image_builder.py	86.79% <86.79%> (ø)

... and 48 files with indirect coverage changes

[sentry]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ ApiError: status=400 body={'detail': ErrorDetail(string='message is not a tag in the metrics dataset', code... sentry.tasks.activity.send_activity_notifications View Issue

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