Update ingress-nginx to latest version supporting Kubernetes 1.26

Context

Kubernetes 1.26 was released on 9 December 2022. We need to make sure that our projects and project templates support this new version.

Kubernetes 1.26 is supported in NGINX-Ingress controller version 1.6.4 (see table). The equivalent Helm chart version of nginx-ingress 1.6.4 is 4.5.2 (see comment).

We need to update the nginx-ingress version in the corresponding helm file to 4.5.2.

Tests

This is based on the steps detailed here, and tested against a k3s cluster with version v1.26.2-k3s1.

1. Test Setup + testing versions before 4.5.2 for comparison
2. Testing version 4.5.2
3. Testing AutoDevops