chore(administration): add bpn address for pool access in admin service

[tfjanjua]

Description

Developed an API in portal-backend to get data from partner-network-pool instead of calling business-partner-pool service directly from the portal-frontend.

Why

This approach will make it consistent and secure, as we are already been calling business-partner-pool service from portal-backed to get legal-entity data by BPN.

Issue

Ref: #457

Corresponding Backend PR

eclipse-tractusx/portal-backend#1082

Checklist

• I have performed a self-review of my changes
• I have successfully tested my changes
• I have added comments in the default values.yaml file with helm-docs syntax ('# -- ') if relevant for installation
• I have commented my changes, particularly in hard-to-understand areas

[tfjanjua]

Now we dont need this config, since we already have

- name: "BPNACCESS__BASEADDRESS"
   value: "{{ .Values.bpdm.poolAddress }}{{ .Values.bpdm.poolApiPath }}"

Closing this PR