fix(vector): add missing namespace to HPA, PDB, and PSP templates

[kobin23]

Description:

• ArgoCD v3.3 has updated to kustomize v5.8.0
• kustomize v5.8.0 has changed the way kustomize handles helmCharts: fix: Propagate Namespace correctly to Helm kubernetes-sigs/kustomize#5940 which has a nice tl;dr:

TL;DR

If you use Kustomize with Helm charts, ensure that your Helm templates explicitly set the namespace, for example:

metadata:
  namespace: {{ .Release.Namespace }}

If your charts already handle namespaces this way, this change should not introduce any breaking behavior.

Most of the resources in the Vector helm chart already include this namespace part, but not all of them, and rendering them using kustomize >= 5.8.0 leaves those resources w/o namespace

[hlhc]

Looks like the HAProxy manifests also missing namespace field. Should we add it for consistency?

[kobin23]

Looks like the HAProxy manifests also missing namespace field. Should we add it for consistency?

@hlhc done