[Bexley][WW] Cancel GGW subscription

[nephila-nacrea]

For https://github.com/mysociety/societyworks/issues/4679.

[skip changelog]

[codecov]

Codecov Report

Attention: Patch coverage is 62.50000% with 27 lines in your changes missing coverage. Please review.

Project coverage is 82.41%. Comparing base (0c20788) to head (71b7645).
Report is 1 commits behind head on bexley-ww-garden-subscription.

Files with missing lines	Patch %	Lines
perllib/Integrations/Agile.pm	25.92%	20 Missing ⚠️
perllib/FixMyStreet/Cobrand/Bexley/Garden.pm	81.57%	3 Missing and 4 partials ⚠️

Additional details and impacted files

@@                        Coverage Diff                        @@
##           bexley-ww-garden-subscription    #5330      +/-   ##
=================================================================
- Coverage                          82.47%   82.41%   -0.06%     
=================================================================
  Files                                418      420       +2     
  Lines                              32948    33018      +70     
  Branches                            5282     5291       +9     
=================================================================
+ Hits                               27175    27213      +38     
- Misses                              4219     4246      +27     
- Partials                            1554     1559       +5     

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