support pulsar v3, update helm & kubernetes' minimum version

[haorenfsa]

What this PR does / why we need it:

part 1/2 of: https://github.com/milvus-io/milvus/issues/30812

Checklist

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

• [x] Chart Version bumped
• [x] Variables are documented in the README.md
• [x] PR only contains changes for one chart

/cc @LoveEachDay @yellow-shine

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: haorenfsa, LoveEachDay

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/zilliztech/milvus-helm/blob/master/OWNERS)~~ [LoveEachDay,haorenfsa] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment