refactor(kubernetes): use init container to prepare code

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 176 lines in your changes missing coverage. Please review.

Project coverage is 30.68%. Comparing base (d1a52f7) to head (3d1b9cd). Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/runner/kubernertes.go	0.00%	176 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #415 +/- ## ========================================== - Coverage 31.41% 30.68% -0.74% ========================================== Files 28 28 Lines 3377 3458 +81 ========================================== Hits 1061 1061 - Misses 2188 2269 +81 Partials 128 128 ```

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[CarlJi]

link #313