Reformat args for radius installation (radius-project#8038)

# Description

This change reformats the args passed into to "install radius" in the
cloud functional tests. This was a single line before and really hard to
review or change.

This broke in one of my recent changes.

## Type of change

- This pull request is a minor refactor, code cleanup, test improvement,
or other maintenance task and doesn't change the functionality of Radius
(issue link optional).

## Contributor checklist
Please verify that the PR meets the following requirements, where
applicable:

- [ ] An overview of proposed schema changes is included in a linked
GitHub issue.
- [ ] A design document PR is created in the [design-notes
repository](https://github.com/radius-project/design-notes/), if new
APIs are being introduced.
- [ ] If applicable, design document has been reviewed and approved by
Radius maintainers/approvers.
- [ ] A PR for the [samples
repository](https://github.com/radius-project/samples) is created, if
existing samples are affected by the changes in this PR.
- [ ] A PR for the [documentation
repository](https://github.com/radius-project/docs) is created, if the
changes in this PR affect the documentation or any user facing updates
are made.
- [ ] A PR for the [recipes
repository](https://github.com/radius-project/recipes) is created, if
existing recipes are affected by the changes in this PR.

Signed-off-by: Ryan Nowak <[email protected]>

.github/workflows/functional-test-cloud.yaml

@@ -648,7 +648,12 @@ jobs:
           echo "*** Installing Radius to Kubernetes ***"
           rad install kubernetes \
             --chart ${{ env.RADIUS_CHART_LOCATION }} \
-            --set rp.image=${{ env.CONTAINER_REGISTRY }}/applications-rp,rp.tag=${{ env.REL_VERSION }},dynamicrp.image=${{ env.CONTAINER_REGISTRY }}/dynamic-rp,dynamicrp.tag=${{ env.REL_VERSION }},controller.image=${{ env.CONTAINER_REGISTRY }}/controller,controller.tag=${{ env.REL_VERSION }},ucp.image=${{ env.CONTAINER_REGISTRY }}/ucpd,ucp.tag=${{ env.REL_VERSION }},de.image=${{ env.DE_IMAGE }},de.tag=${{ env.DE_TAG }},global.azureWorkloadIdentity.enabled=true
+            --set rp.image=${{ env.CONTAINER_REGISTRY }}/applications-rp,rp.tag=${{ env.REL_VERSION }} \
+            --set dynamicrp.image=${{ env.CONTAINER_REGISTRY }}/dynamic-rp,dynamicrp.tag=${{ env.REL_VERSION }} \
+            --set controller.image=${{ env.CONTAINER_REGISTRY }}/controller,controller.tag=${{ env.REL_VERSION }} \
+            --set ucp.image=${{ env.CONTAINER_REGISTRY }}/ucpd,ucp.tag=${{ env.REL_VERSION }} \
+            --set de.image=${{ env.DE_IMAGE }},de.tag=${{ env.DE_TAG }} \
+            --set global.azureWorkloadIdentity.enabled=true
 
           echo "*** Create workspace, group and environment for test ***"
           rad workspace create kubernetes