support API request paths under GeoServer service

[fmigneault]

Features / Changes

• Add support of RESTful API endpoints (i.e.: ServiceAPI) under ServiceGeoserver using Route resources
  (fixes [Feature] Extend ServiceGeoserver to allow ServiceAPI-style permissions for /web routes #584).
  Requires the Service to be configured either with the default configuration,
  or by explicitly setting api: true. When a HTTP request is sent toward a Service typed ServiceGeoserver,
  any non-OWS request (i.e.: WFS, WMS, WPS) will default to the resolution handling of typical ServiceAPI.
  This can be used notably to access the /web and /ogc endpoints of a GeoServer instance.

Bug Fixes

• Fix UI rendering of the Permission label list under a Service edition page when a large amount of possible
  permissions is applicable. This was notably the case of ServiceGeoserver that combines permissions of multiple
  OWS-based services, which where going out of bound of the UI page.

• Fix UI scrollbars going over the Permission titles in the User and Group permission edition pages.

  Before UI fixes:
  

  After UI fixes:
  

Relates to bird-house/birdhouse-deploy#348

[fmigneault]

CI test-remote case expected to fail for tests/test_magpie_api.py::TestCase_MagpieAPI_AdminAuth_Remote::test_GetResourceTypes_ServiceGeoserver until bumped, since >=3.35.0 condition is not met until then.
Corresponding CI test-local validates this condition assuming "latest" code including expected 3.35.0 changes.

[codecov]

Codecov Report

Patch coverage: 80.64% and project coverage change: +0.04% 🎉

Comparison is base (45f6085) 80.77% compared to head (102af33) 80.81%.
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #585      +/-   ##
==========================================
+ Coverage   80.77%   80.81%   +0.04%     
==========================================
  Files          73       73              
  Lines       10162    10172      +10     
  Branches     1816     1818       +2     
==========================================
+ Hits         8208     8221      +13     
+ Misses       1630     1629       -1     
+ Partials      324      322       -2     

Files Changed	Coverage Δ
magpie/owsrequest.py	94.64% <ø> (ø)
magpie/xml_util.py	88.88% <ø> (ø)
magpie/ui/management/views.py	47.91% <62.50%> (+0.07%)	⬆️
magpie/services.py	81.15% <86.36%> (+0.65%)	⬆️
magpie/__meta__.py	100.00% <100.00%> (ø)

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