fix(cstor restore): use relevant labels to fetch CSPI name

[mittachaitu]

Signed-off-by: mittachaitu sai.chaithanya@mayadata.io

This PR fixes the issue to fetch the status of CStorRestore.

Bug Description:
Currently, CStorRestore resource is created using one of the label called
cstorpoolinstance.openebs.io/name: <cspi_name> but while
fetching the status of CStorRestore we are also fetching Pool-manager
status(Only in a case where CStorRestore status is not in Done/Failed state).
To fetch the pool manager we are using the CSPI name from non-existing
label(i.e openebs.io/cstor-pool-instance) of CStorRestore resource.
Due to that, there were partial failure errors in velero restore.

Below are the logs before fix:

I1007 07:12:14.661377       1 restore_endpoint.go:520] Restore:percona-backup-7621141a-c5bb-49e1-9d79-5a01289b9771 created for volume "pvc-45d71edb-30d8-48f5-b591-a7cd3d7b1ecd" CSPI: cstor-cspc-disk-pool-7rjt
I1007 07:12:14.665541       1 restore_endpoint.go:520] Restore:percona-backup-30b70276-0d96-4de6-804c-4211df79c939 created for volume "pvc-45d71edb-30d8-48f5-b591-a7cd3d7b1ecd" CSPI: cstor-cspc-disk-pool-9ckn
I1007 07:12:19.668323       1 restore_endpoint.go:69] Got restore GET request
E1007 07:12:19.674539       1 backup_restore_helper.go:36] failed to find pool manager, empty CSPI is provided
E1007 07:12:19.674584       1 backup_restore_helper.go:72] failed to find pool manager, empty CSPI is provided
I1007 07:12:19.677685       1 restore_endpoint.go:563] Restore:percona-backup-1c4b101f-68e7-4bd8-a717-92f90dcebd7a status is Failed
E1007 07:12:19.677707       1 backup_restore_helper.go:36] failed to find pool manager, empty CSPI is provided
E1007 07:12:19.677714       1 backup_restore_helper.go:72] failed to find pool manager, empty CSPI is provided
I1007 07:12:19.680065       1 restore_endpoint.go:563] Restore:percona-backup-30b70276-0d96-4de6-804c-4211df79c939 status is Failed

After the fix below are the logs:

 Restore volume 'pvc-9125a66d-667b-491d-8c95-ef9bd1180698' created successfully 
I1007 13:23:08.418469       1 restore_endpoint.go:486] V1Alpha1 Restore:defaultbackup-7c98c8b7-c8bf-4f6e-b2c3-03f7fd509f40 created for volume "pvc-9125a66d-667b-491d-8c95-ef9bd1180698" CSPI: cstor-disk-cspc-2d89
I1007 13:23:08.423570       1 restore_endpoint.go:486] V1Alpha1 Restore:defaultbackup-d71334cf-3740-4424-8e7b-f154a5316b4a created for volume "pvc-9125a66d-667b-491d-8c95-ef9bd1180698" CSPI: cstor-disk-cspc-46nl
I1007 13:23:13.429891       1 restore_endpoint.go:69] Got restore GET request
I1007 13:23:25.980573       1 v1alpha1_restore.go:60] Restore:defaultbackup-7c98c8b7-c8bf-4f6e-b2c3-03f7fd509f40 status is InProgress
I1007 13:23:31.001232       1 restore_endpoint.go:69] Got restore GET request
I1007 13:23:32.608636       1 v1alpha1_restore.go:60] Restore:defaultbackup-7c98c8b7-c8bf-4f6e-b2c3-03f7fd509f40 status is InProgress
I1007 13:23:40.947070       1 restore_endpoint.go:69] Got restore GET request
I1007 13:23:44.245559       1 v1alpha1_restore.go:60] Restore:defaultbackup-7c98c8b7-c8bf-4f6e-b2c3-03f7fd509f40 status is InProgress
I1007 13:23:49.254671       1 restore_endpoint.go:69] Got restore GET request
I1007 13:23:49.341722       1 v1alpha1_restore.go:60] Restore:defaultbackup-7c98c8b7-c8bf-4f6e-b2c3-03f7fd509f40 status is InProgress
I1007 13:23:54.342754       1 restore_endpoint.go:69] Got restore GET request
I1007 13:23:55.318231       1 v1alpha1_restore.go:60] Restore:defaultbackup-7c98c8b7-c8bf-4f6e-b2c3-03f7fd509f40 status is InProgress
I1007 13:24:00.319726       1 restore_endpoint.go:69] Got restore GET request
I1007 13:24:00.341778       1 v1alpha1_restore.go:60] Restore:defaultbackup-7c98c8b7-c8bf-4f6e-b2c3-03f7fd509f40 status is InProgress
I1007 13:24:05.342677       1 restore_endpoint.go:69] Got restore GET request
I1007 13:24:05.345903       1 v1alpha1_restore.go:60] Restore:defaultbackup-7c98c8b7-c8bf-4f6e-b2c3-03f7fd509f40 status is Done