OSPRH-19986: Replace hardcoded /home/zuul in: bgp scenarios

replaced /home/zuul with {{ ansible_user_dir }} in three locations
The goal of this change is to improve flexibility and consistency by
replacing hardcoded home paths with variables.

Author: brjackma

scenarios/reproducers/bgp-l3-xl.yml

@@ -754,7 +754,7 @@ cifmw_libvirt_manager_configuration:
 cifmw_devscripts_config_overrides:
   fips_mode: "{{ cifmw_fips_enabled | default(false) | bool }}"
   cluster_subnet_v4: "192.172.0.0/16"
-  network_config_folder: "/home/zuul/netconf"
+  network_config_folder: "{{ ansible_user_dir }}/netconf"
 
 # Required for egress traffic from pods to the osp_trunk network
 cifmw_devscripts_enable_ocp_nodes_host_routing: true
@@ -763,7 +763,7 @@ cifmw_devscripts_enable_ocp_nodes_host_routing: true
 # controller-0 as-is and be consumed by the `deploy-va.sh` script.
 # Please note, all paths are on the controller-0, meaning managed by the
 # Framework. Please do not edit them!
-_arch_repo: "/home/zuul/src/github.com/openstack-k8s-operators/architecture"
+_arch_repo: "{{ ansible_user_dir }}/src/github.com/openstack-k8s-operators/architecture"
 cifmw_architecture_scenario: bgp-l3-xl
 cifmw_kustomize_deploy_architecture_examples_path: "examples/dt/"
 cifmw_arch_automation_file: "bgp-l3-xl.yaml"
@@ -791,7 +791,7 @@ cifmw_kustomize_deploy_metallb_source_files: >-
 pre_deploy:
   - name: BGP spines and leaves configuration
     type: playbook
-    source: "/home/zuul/src/github.com/openstack-k8s-operators/ci-framework/playbooks/bgp/prepare-bgp-spines-leaves.yaml"
+    source: "{{ ansible_user_dir }}/src/github.com/openstack-k8s-operators/ci-framework/playbooks/bgp/prepare-bgp-spines-leaves.yaml"
     extra_vars:
       num_racks: "{{ num_racks }}"
       router_bool: true