fix:an unschedulable bestEffort Pod affects the scheduling of other pending bestEffort pods

[Lily922]

fix:an unschedulable bestEffort Pod affects the scheduling of other pending bestEffort pods

If there is a pending BestEffort Pod in the cluster that cannot be scheduled, for example, the node affinity cannot be satisfied. The processing loop will break and the subsequent Pending Pods in pendingTasks slice can never be processed.

[volcano-sh-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
To complete the pull request process, please assign hwdef
You can assign the PR to them by writing /assign @hwdef in a comment when ready.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• pkg/scheduler/OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[lowang-bh]

Coud you add a test case to cover it? thanks.