[Discogapic] Parse ResourceName when it contains a service address

[andreamlin]

This would fix googleapis/google-cloud-java#3604.

Problem: When a resource comes back from the server, its resource path is something like

instance.zone = https://www.googleapis.com/compute/v1/projects/project-123/zones/europe-west3-c

And that string won't be parseable against a PathTemplate of form {project}/zones/{zone}.

Proposed solution: Optionally ignore the leading service address, which for Compute is https://www.googleapis.com/compute/v1/projects/.

See googleapis/google-cloud-java#4208 for resulting changes.

[codecov-io]

Codecov Report

Merging #2477 into fix_compute_resource_parsing will increase coverage by <.01%.
The diff coverage is 100%.

@@                        Coverage Diff                        @@
##             fix_compute_resource_parsing   #2477      +/-   ##
=================================================================
+ Coverage                            86.8%   86.8%   +<.01%     
  Complexity                           5365    5365              
=================================================================
  Files                                 459     459              
  Lines                               21175   21176       +1     
  Branches                             2308    2308              
=================================================================
+ Hits                                18381   18382       +1     
  Misses                               1972    1972              
  Partials                              822     822

Impacted Files	Coverage Δ	Complexity Δ
...degen/viewmodel/StaticLangApiResourceNameView.java	75% <ø> (ø)	2 <0> (ø)	⬇️
...degen/discogapic/transformer/DiscoGapicParser.java	92.72% <ø> (ø)	22 <0> (ø)	⬇️
...a/JavaDiscoGapicResourceNameToViewTransformer.java	100% <100%> (ø)	15 <0> (ø)	⬇️

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[andreamlin]

ci/circleci: compute-discovery-test is going to fail because googleapis/discovery-artifact-manager#102 isn't merged yet.

[andreamlin]

PTAL