[WIP] fix(python): Decode the k8s node selector and convert it as a dict.

[dashanji]

What do these changes do?

As titled.

During test, I find not all pods are scheduled to the same node.

NAME                                             READY   STATUS    RESTARTS   AGE     IP            NODE           NOMINATED NODE   READINESS GATES
coordinator-ozgjbb-6c57549cf7-hhwqt              1/1     Running   0          4m2s    10.244.1.85   kind-worker    <none>           <none>
gs-engine-ozgjbb-0                               3/3     Running   0          3m58s   10.244.1.86   kind-worker    <none>           <none>
gs-engine-ozgjbb-1                               3/3     Running   0          114s    10.244.1.87   kind-worker    <none>           <none>
gs-engine-ozgjbb-2                               3/3     Running   0          108s    10.244.1.88   kind-worker    <none>           <none>
gs-engine-ozgjbb-ozgjbb-vineyard-etcd-0          1/1     Running   0          3m58s   10.244.3.71   kind-worker2   <none>           <none>
gs-interactive-frontend-ozgjbb-8d996bc8b-ctn6x   1/1     Running   0          3m58s   10.244.3.72   kind-worker2   <none>           <none>

We should support to add the node selector to the frontend and vineyard etcd.

Related issue number

Fixes #3476

[codecov-commenter]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (9228223) 48.81% compared to head (56249ce) 45.34%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3477      +/-   ##
==========================================
- Coverage   48.81%   45.34%   -3.47%     
==========================================
  Files         177      176       -1     
  Lines       16198    16171      -27     
==========================================
- Hits         7907     7333     -574     
- Misses       8291     8838     +547     

Files	Coverage Δ
...n/graphscope/deploy/kubernetes/resource_builder.py	24.89% <0.00%> (-47.46%)	⬇️

... and 16 files with indirect coverage changes

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