[Bug ?] Open-Local storage volume（PVC/PV） judgment with storageclass not found.

[luokp]

Ⅰ. Issue Description

1. The storage class used by the pvc mounted by pod has been deleted, and the pvc was not created by openlocal. When openlocal plugin is not installed in the cluster, pod restart can be normally scheduled and pvc can be successfully mounted.

2. After deploying openlocal in the cluster, all pod scheduling needs to go through shceduler-extender. Then，pod schedule failed。

Ⅱ. Describe what happened

In the predicate phase of shcheduler-extender, StorageTypePredicate() will return an error: failed to get storage class by name. This causes pod scheduling to fail.

Ⅲ. Describe what you expected to happen

Optimize the volume judgment logic (perhaps in utils.NeedSkip()), if the pvc is not created by openlocal, then regardless of whether there is a storageclass, directly return to skip the shceduler-extender scheduling.

Ⅳ. How to reproduce it (as minimally and precisely as possible)

Ⅴ. Anything else we need to know?

Ⅵ. Environment:

• Open-Local version:
• OS (e.g. from /etc/os-release):
• Kernel (e.g. uname -a):
• Install tools:
• Others:

[pangsq]

Same problem.
It should ignore "NotFound" error when getting StorageClass, because k8s can bind pvc/pv when StorageClass does no exist.
I found some related code.
https://github.com/alibaba/open-local/blob/v0.7.1/pkg/scheduler/algorithm/predicates/storage_type.go#L84
https://github.com/alibaba/open-local/blob/v0.7.1/pkg/scheduling-framework/filter.go#L55