Refactor prepareResourceClaim for improved readability and maintainability

[gauravkghildiyal]

The prepareResourceClaim function in pkg/driver/dra_hooks.go has become overly complex and needs to be refactored

dranet/pkg/driver/dra_hooks.go

Line 121 in 0260dce

func (np *NetworkDriver) prepareResourceClaims(ctx context.Context, claims []*resourceapi.ResourceClaim) (map[types.UID]kubeletplugin.PrepareResult, error) {