Make URL secrets removal more resilient

[benoit74]

Fix #1012

When we do not achieve to parse the URL, then we are probably not dealing with a URL so we can keep it as-is and avoid to crash.

We should probably check once per month if there is something sensible which has been ignored by this code thanks to logs in grafana.

[codecov]

Codecov Report

Attention: Patch coverage is 40.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 88.29%. Comparing base (27fac52) to head (3b3f87c).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
dispatcher/backend/src/routes/utils.py	40.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1019      +/-   ##
==========================================
- Coverage   88.33%   88.29%   -0.05%     
==========================================
  Files          96       96              
  Lines        5385     5389       +4     
==========================================
+ Hits         4757     4758       +1     
- Misses        628      631       +3     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[rgaudin]

LGTM

We saw it coming though