K8s chart update

[2o1o0]

Those fix a few things, plus add support for :

• gameserver data files download when pv is empty
• external mysql server (untested)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (6fe9994) 25.81% compared to head (7b193a2) 25.81%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## k8s #6 +/- ## ======================================= Coverage 25.81% 25.81% ======================================= Files 28 28 Lines 3997 3997 ======================================= Hits 1032 1032 Misses 2874 2874 Partials 91 91 ```

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[walkline]

Thanks @2o1o0 again, looks good to me! And external database works as expected 👍