[multiple] Consolidate multiple repo url vars to group_vars

[amartyasinha]

Move the definition of cifmw_architecture_repo_url, cifmw_repo_url, and cifmw_installyamls_repo_url to group_vars so that it can be easily changes and managed at a single place.

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[softwarefactory-project-zuul]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/d00927f05e55401ca0951b3ae49298a4

❌ openstack-k8s-operators-content-provider FAILURE in 4m 47s
⚠️ podified-multinode-edpm-deployment-crc SKIPPED Skipped due to failed job openstack-k8s-operators-content-provider
⚠️ cifmw-crc-podified-edpm-baremetal SKIPPED Skipped due to failed job openstack-k8s-operators-content-provider
⚠️ cifmw-crc-podified-edpm-baremetal-minor-update SKIPPED Skipped due to failed job openstack-k8s-operators-content-provider
✔️ noop SUCCESS in 0s
✔️ cifmw-pod-ansible-test SUCCESS in 8m 09s
✔️ cifmw-pod-pre-commit SUCCESS in 7m 55s

[amartyasinha]

Resolved merge conflict through the recent push. No changes made.