Add validation of pod deletion

[keemano]

This PR addresses the issue 9560

In this test, reclaim space job was created immediately after the deletion of app pod, which caused the reclaim space job failure.
There was a miss to validate pod deletion prior to the creation of the reclaim space job. This PR adds the validation of pod deletion.

[ocs-ci]

Unknown PR validation on existing cluster

Cluster Name: kmanohar-c113
Cluster Configuration:
PR Test Suite: tier2
PR Test Path: tests/functional/pv/space_reclaim/test_rbd_space_reclaim.py
Additional Test Params:
OCP VERSION: 4.17
OCS VERSION: 4.17
tested against branch: master

Job state: ABORTED.

[ocs-ci]

PR validation on existing cluster

Cluster Name: kmanohar-c113
Cluster Configuration:
PR Test Suite: tier2
PR Test Path: tests/functional/pv/space_reclaim/test_rbd_space_reclaim.py
Additional Test Params:
OCP VERSION: 4.17
OCS VERSION: 4.17
tested against branch: master

Job PASSED.

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: jilju, keemano, sidhant-agrawal

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