PengYuan

@gyfora @wangyang0918 Please help me review this PR.

@usamj Maybe we can set three mode for flinkdeployment CR： 1. native 2. standalone_deployment 3. standalone_statefulset two of these modes are available as standalone： 1. standalone_deployment 2. standalone_statefulset And volumeClaimTemplates...

@gyfora I believe that configuring PVC for JM is necessary in some scenarios. As @usamj said，we can set a configurable option for standalone to choose Deployment or StatefulSet.

@gyfora @wangyang0918 @morhidi @usamj Thanks for yours review. I will make a FLIP to describe the proposal.

The scheduler can be setting with schedulerName in podTemplate simply,I think there is no need to add options to kubernetes config. 

@wangyang0918 Please help me review this PR.

> * @flinkbot run azure

> Could we fix this issue in the `KubernetesUtils#loadPodFromTemplateFile`? Set an empty spec if not specified. This PR fixes the issue in KubernetesUtils#loadPodFromTemplateFile. When no spec field is specified, set...

@flinkbot run azure

> Would you like to create a backport PR to release-1.15? My pleasure! The backport PR has been created to release-1.15: https://github.com/apache/flink/pull/20558