Support specifying ingress class in Kong addon

[randmonkey]

Is there an existing issue for this?

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Problem Statement

Currently the kong addon in KTF can only use the kong ingress class. We want to support installing Kong for different ingress classes.

Proposed Solution

Add a WithIngressClass method in kong add on to set ingress class.

Additional information

No response

Acceptance Criteria

• Can specify ingress class by Kong addon to install Kong in the cluster.