[pulsar] Upgrade ingress api to `networking.k8s.io/v1`

[FushuWang]

Fixes #640

Motivation

Fix ingress api issue when installing pulsar chart into k8s v1.19+.

Modifications

Breaking changes.

Use networking.k8s.io/v1 directly which requires the k8s version is v1.19+.

Verifying this change

• [x] Make sure that the change passes the CI checks.

Documentation

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Need to update docs?

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