[Kingston] add flow for reporting bins not returned or contents spilled

[struan]

This is mostly based on the Sutton code with a few Kingston specific changes to add checkbox extra details to the bin not returned, plus an extra message for FAS properties for spillages.

Fixes mysociety/societyworks#5245
Fixes mysociety/societyworks#5246

[skip changelog]

[codecov]

Codecov Report

❌ Patch coverage is 98.21429% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 83.14%. Comparing base (13cc03e) to head (02b6e09).
⚠️ Report is 29 commits behind head on master.

Files with missing lines	Patch %	Lines
perllib/FixMyStreet/Cobrand/Kingston.pm	94.44%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5768      +/-   ##
==========================================
+ Coverage   82.59%   83.14%   +0.54%     
==========================================
  Files         457      457              
  Lines       35689    38061    +2372     
  Branches     5814     6366     +552     
==========================================
+ Hits        29479    31646    +2167     
- Misses       4515     4694     +179     
- Partials     1695     1721      +26     

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[dracos]

Looks good, some refactoring mostly I think :)

[dracos]

Tiny issue with the email template to resolve, symlink thing I'm sure we can fix.

[dracos]

There's one more kingston check unneeded in the second sub-IF.

[dracos]

And same issue with missed collections as the HTML

[dracos]

Woo; still got that superfluous ELSIF cobrand.moniker == 'kingston' in the text email but doesn't matter if it's left in :)