Add loadBalancerSourceRanges

[alexz75]

Added loadBalancerSourceRanges into service to provide network level security

[CLAassistant]

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1 out of 2 committers have signed the CLA.

✅ alexz75
❌ alexs-airo
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[kolesnikovae]

Thank you for the contribution @alexz75! I'm terribly sorry for such a long delay in response – for some reason I simply missed the notification.

The PR looks good! There are a couple of notes from me:

• A nit: it would be nice to describe the new option in README - please see my suggestion
• Some CI checks fail: please take a look at our contribution guide:
  1. Versions need a bump – alas, you need to update versions manually in your branch
  2. We use helm-docs to generate the documentation