fix: avoid dependency on pydantic

[JoanFM]

Pull Request Title

Description

Please describe what your PR is doing and why. Are there any parts which need extra attention during review? Are there any dependencies from other PRs or projcts? Is this a breaking change?

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Closes # (issue)

[codecov]

Codecov Report

Merging #4497 (e267007) into master (efff154) will decrease coverage by 0.17%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4497      +/-   ##
==========================================
- Coverage   87.72%   87.54%   -0.18%     
==========================================
  Files         116      116              
  Lines        8458     8457       -1     
==========================================
- Hits         7420     7404      -16     
- Misses       1038     1053      +15     

Flag	Coverage Δ
daemon	41.94% <33.33%> (-1.34%)	⬇️
jina	87.30% <100.00%> (+0.42%)	⬆️

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Impacted Files	Coverage Δ
jina/serve/runtimes/gateway/http/models.py	99.15% <ø> (-0.01%)	⬇️
jina/__init__.py	67.46% <100.00%> (ø)
jina/serve/runtimes/gateway/http/app.py	90.67% <100.00%> (ø)
jina/serve/networking.py	71.31% <0.00%> (-11.85%)	⬇️
jina/orchestrate/pods/jinad.py	93.07% <0.00%> (-1.54%)	⬇️
jina/orchestrate/pods/__init__.py	89.93% <0.00%> (+0.62%)	⬆️
jina/serve/runtimes/gateway/http/__init__.py	100.00% <0.00%> (+2.43%)	⬆️
jina/orchestrate/deployments/__init__.py	84.81% <0.00%> (+2.95%)	⬆️
jina/orchestrate/deployments/config/helper.py	98.27% <0.00%> (+12.06%)	⬆️
...rate/deployments/config/k8slib/kubernetes_tools.py	100.00% <0.00%> (+21.42%)	⬆️

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