feat: add ingressClass

[cin-logan]

What this PR does / why we need it:

Since to EKS version 1.22, deprecated nginx kubernetes.io/ingress.class and we need to upgrade to using ingressClassName then i have create PR to do this

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• Chart Version bumped
• Variables are documented in the README.md
• Title of the PR starts with chart name (e.g. [mychartname])
• PR only contains changes for one chart

[sre-ci-robot]

Welcome @cin-logan! It looks like this is your first PR to zilliztech/milvus-helm 🎉

[haorenfsa]

Hi @cin-logan, it would be better to add an default empty string value in charts/milvus/values.yaml, so that in other people can easily search for this field if they need it. It can also make the to auto generated documents better, like in https://artifacthub.io/packages/helm/milvus/milvus?modal=values.

[haorenfsa]

/approve

[cin-logan]

could you help me to review it again ? thanks @haorenfsa

[haorenfsa]

@cin-logan looks good, please bump the chart version to 4.2.1. And we're ready to merge it.

[cin-logan]

Sorry for the inconvenience, I have force-pushed again 😢. Could you check it, @haorenfsa

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cin-logan, haorenfsa

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[haorenfsa]

/lgtm