Fix polarion role for "update test runs task"

[son-vyas]

The task is encountering an issue because it expects a list of objects with a path attribute, but instead, it is receiving a
string.
The map(attribute='path') filter is being applied to a string, which causes the error.

To resolve this, ensure that xml_files.files is a list of dictionaries, each containing a path key.

As a pull request owner and reviewers, I checked that:

• Appropriate testing is done and actually running
• Appropriate documentation exists and/or is up-to-date:
  • README in the role
  • Content of the docs/source is reflecting the changes

[openshift-ci]

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[github-actions]

Thanks for the PR! ❤️
I'm marking it as a draft, once your happy with it merging and the PR is passing CI, click the "Ready for review" button below.

[arxcruz]

#1705 fixes it, this patch is no longer required

[arxcruz]

/dnm

[openshift-ci]

Adding label do-not-merge/contains-merge-commits because PR contains merge commits, which are not allowed in this repository.
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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://review.rdoproject.org/zuul/buildset/63999ba2d1e7433f93c699d6b174a438

✔️ openstack-k8s-operators-content-provider SUCCESS in 1h 38m 08s
✔️ podified-multinode-edpm-deployment-crc SUCCESS in 1h 19m 55s
❌ cifmw-crc-podified-edpm-baremetal MERGE_CONFLICT in 4s
✔️ noop SUCCESS in 0s
✔️ cifmw-pod-ansible-test SUCCESS in 8m 15s
✔️ cifmw-pod-pre-commit SUCCESS in 7m 38s
✔️ cifmw-molecule-polarion SUCCESS in 1m 50s