PWX-38345: Put empty string check in volumeName while collecting the volumes for enumerate call in GetPodVolumes.

[diptiranjanpx]

Signed-Off-By: Diptiranjan

What type of PR is this?

bug

What this PR does / why we need it:
In GetPodVolumes while creating volume names list for the enumerateVolumes api call, we have to consider only the pod volumes which has PVC and are not WFFC.

Does this PR change a user-facing CRD or CLI?:
no

Is a release note needed?:
yes

Issue: Stong hyper convergence for pods was not working  if pods have projected volumes.
User Impact: Pods remain in pending state while using `stork.libopenstorage.org/preferLocalNodeOnly` for strong hyperconvergence.
Resolution: Pods will get scheduled in the node where volume replica lies with`stork.libopenstorage.org/preferLocalNodeOnly` annotation.

Does this change need to be cherry-picked to a release branch?:
yes, 24.2.5

Test:
Tested with strong hyperconvergence with annotation preferLocalNodeOnly and updated the ticket with the results.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 38.07%. Comparing base (c81f52d) to head (6bbe412).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1818   +/-   ##
=======================================
  Coverage   38.07%   38.07%           
=======================================
  Files          51       51           
  Lines       11477    11477           
=======================================
  Hits         4370     4370           
+ Misses       6714     6713    -1     
- Partials      393      394    +1     

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