Fix for Snapshot restore of GDP-Scale PVC with 'G' units fails

[shravaniphadolibm]

Pull request checklist

CNSA issue no 8820

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature Enhancement
• Test Automation
• Code Refactoring (no functional changes, no api changes)
• Build related changes
• Community Operator listing
• Other (please describe):

What is the current behavior?

• Snapshot restoration fails for restore size greater than pvc size (decimal unit)

What is the new behavior?

• Snapshot restore size is less than pvc capacity hence snapshot restoration is successful.

How risky is this change?

• Small, isolated change
• Medium, requires regression testing
• Large, requires functional and regression testing

[shravaniphadolibm]

Image for testing : quay.io/shravanired123/ibm-spectrum-scale-csi-driver:10junetest2

[badri-pathak]

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[deeghuge]

we have check in function IfSameVolReqInProcess(). We have to make sure this change is not breaking that check.

@deeghuge, could you please re-review ?