[CRT217] Canal & River Trust: site config

[nephila-nacrea]

For https://github.com/mysociety/societyworks/issues/5580; specifically:

• fixes https://github.com/mysociety/societyworks/issues/5582
• fixes https://github.com/mysociety/societyworks/issues/5585
• tests for https://github.com/mysociety/societyworks/issues/5586

[skip changelog]

[codecov]

Codecov Report

❌ Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.09%. Comparing base (9e94298) to head (48e964a).

Files with missing lines	Patch %	Lines
perllib/FixMyStreet/Cobrand/CanalRiverTrust.pm	33.33%	2 Missing ⚠️

Additional details and impacted files

@@                   Coverage Diff                    @@
##           canal-trust-frontend    #6033      +/-   ##
========================================================
- Coverage                 84.48%   83.09%   -1.39%     
========================================================
  Files                       504      492      -12     
  Lines                     44313    36914    -7399     
  Branches                   8082     6049    -2033     
========================================================
- Hits                      37438    30674    -6764     
+ Misses                     4947     4467     -480     
+ Partials                   1928     1773     -155     

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