fix: pass extra arguments to gateway runtime with container pod

[alaeddine-13]

In case a custom gateway is started using the container pod, Jina will not pass some arguments to the container entrypoint (due to differences between a normal pod and a gateway pod).
This means that if a Gateway implementation needs to know its protocol (for instance, the composite gateway), the overridden protocol will not reach the runtime.
This PR fixes this issue and adds coverage in the tests

[codecov]

Codecov Report

Merging #5631 (7b5b372) into master (936249c) will increase coverage by 2.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #5631      +/-   ##
==========================================
+ Coverage   85.09%   87.12%   +2.03%     
==========================================
  Files         124      124              
  Lines       10129    10131       +2     
==========================================
+ Hits         8619     8827     +208     
+ Misses       1510     1304     -206     

Flag	Coverage Δ
jina	87.12% <100.00%> (+2.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
jina/orchestrate/pods/container.py	87.31% <100.00%> (+0.12%)	⬆️
jina/jaml/parsers/__init__.py	81.81% <0.00%> (-15.91%)	⬇️
...rate/deployments/config/k8slib/kubernetes_tools.py	86.53% <0.00%> (-13.47%)	⬇️
...a/orchestrate/deployments/config/docker_compose.py	94.68% <0.00%> (-4.35%)	⬇️
jina/jaml/parsers/flow/v1.py	96.96% <0.00%> (-3.04%)	⬇️
jina/clients/helper.py	97.61% <0.00%> (-2.39%)	⬇️
jina/jaml/helper.py	81.75% <0.00%> (-2.19%)	⬇️
jina/serve/helper.py	91.66% <0.00%> (-2.09%)	⬇️
jina/orchestrate/flow/base.py	84.50% <0.00%> (-1.25%)	⬇️
jina/orchestrate/deployments/config/k8s.py	99.37% <0.00%> (-0.63%)	⬇️
... and 30 more

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