Jferg/custom feedback email

[JoshFerge]

Custom email template for feedbacks

Pretty close to the figma:

https://www.figma.com/file/nLS7ZsjVmuSoCmEkMG5nHn/Specs%3A-Alerting-Emails-for-Feedback-v1?type=design&node-id=0-1&mode=design&t=JP3BHibPfXNv79v4-0

[codecov]

Codecov Report

Merging #59641 (cde465f) into master (c794d43) will decrease coverage by 0.01%.
Report is 9 commits behind head on master.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master   #59641      +/-   ##
==========================================
- Coverage   80.76%   80.76%   -0.01%     
==========================================
  Files        5172     5175       +3     
  Lines      226964   227008      +44     
  Branches    38158    38162       +4     
==========================================
+ Hits       183302   183336      +34     
- Misses      38103    38117      +14     
+ Partials     5559     5555       -4     

Files	Coverage Δ
src/sentry/issues/grouptype.py	98.89% <100.00%> (ø)
src/sentry/testutils/helpers/notifications.py	90.19% <100.00%> (+0.19%)	⬆️
src/sentry/web/debug_urls.py	100.00% <100.00%> (ø)
src/sentry/web/frontend/debug/mail.py	84.02% <12.50%> (-1.74%)	⬇️
.../sentry/web/frontend/debug/debug_feedback_issue.py	57.89% <57.89%> (ø)

... and 23 files with indirect coverage changes

[getsantry]

This issue has gone three weeks without activity. In another week, I will close it.

But! If you comment or otherwise update it, I will reset the clock, and if you remove the label Waiting for: Community, I will leave it alone ... forever!

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"A weed is but an unloved flower." ― Ella Wheeler Wilcox 🥀