feat: add pathType to ingress_path

[rexagod]

This avoids duplicate metrics (and thus, PrometheusDuplicateTimestamps) for schemas such as:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: minimal-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  ingressClassName: nginx-example
  rules:
  - http:
      paths:
      - backend:
          service:
            name: cart
            port:
              number: 3000
        path: /nvc/cart
        pathType: Prefix
      - backend:
          service:
            name: cart
            port:
              number: 3000
        path: /nvc/cart
        pathType: Exact

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[mrueg]

/hold

/lgtm

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mrueg, rexagod

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[mrueg]

/hold cancel

due to lack of feedback from anyone else in the past weeks.