Ability to specify cpu/memory request for portal admin dashboard components

[pszeto]

Is your feature request related to a problem? Please describe. A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] Abibility to specify cpu/memory request for portal admin dashboard components

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Similar to how the you're able to define the cpu/memory resources for the portal controller via helm values. https://docs.solo.io/gloo-portal/latest/reference/helm/ The admin dashboard should have the same ability.

# Settings for the Gloo Portal admin dashboard
adminDashboard:
  resources:
    requests:
      cpu: 512m
      memory: 512Mi

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