Make timeout during waiting for uploadImage configurable

[votdev]

Problem:
In VM Import Controller, the timeout after which the VM Import Controller fails (when waiting for uploadImage on OpenStack) is hard-coded to 300s or 5min (30 iterations of a 10s wait loop).

This should be configurable because the uploadImage OpenStack API Call can take several dozens of minutes if not hours sometimes.

Solution:
Add the fields UploadImageRetryCount and UploadImageRetryDelay to OpenstackSourceSpec.

Related Issue:
harvester/harvester#6675

Test plan:

• Create a OpenstackSource. e.g. like this:

apiVersion: migration.harvesterhci.io/v1beta1
kind: OpenstackSource
metadata:
  name: foo
  namespace: default
spec:
  endpoint: "http://xxx.xxx.xxx.xxx/identity"
  region: "bar"
  credentials:
    name: foo-credentials
    namespace: default
  UploadImageRetryCount: 50
  uploadImageRetryDelay: 15

• Trigger a VM import:

apiVersion: migration.harvesterhci.io/v1beta1
kind: VirtualMachineImport
metadata:
  name: cirros-tiny
  namespace: default
spec:
  virtualMachineName: "cirros-tiny"
  networkMapping:
  - sourceNetwork: "shared"
    destinationNetwork: "default/vlan1"
  sourceCluster:
    name: foo
    namespace: default
    kind: OpenstackSource
    apiVersion: migration.harvesterhci.io/v1beta1

• The log output should look like this. Escpecially look out for msg="Waiting for volume to be available" ... retryCount=50 retryDelay=15.

time="2024-10-02T11:36:38Z" level=info msg="Running preflight checks ..." name=cirros-tiny namespace=default spec.virtualMachineName=cirros-tiny
time="2024-10-02T11:36:38Z" level=info msg="Importing client disk images ..." name=cirros-tiny namespace=default spec.virtualMachineName=cirros-tiny
time="2024-10-02T11:36:39Z" level=info msg="Powering off client VM ..." name=cirros-tiny namespace=default spec.virtualMachineName=cirros-tiny
time="2024-10-02T11:36:41Z" level=info msg="Importing client disk images ..." name=cirros-tiny namespace=default spec.virtualMachineName=cirros-tiny
time="2024-10-02T11:36:43Z" level=info msg="Importing client disk images ..." name=cirros-tiny namespace=default spec.virtualMachineName=cirros-tiny
time="2024-10-02T11:36:48Z" level=info msg="Waiting for volume to be available" name=cirros-tiny namespace=default retryCount=50 retryDelay=15 spec.virtualMachineName=cirros-tiny volume.createdAt="2024-10-02 11:36:48.687611 +0000 UTC" volume.id=fcf7e2da-bdd8-4c24-9ff3-7b8faff3554c volume.size=1 volume.snapshotID=56aa80a7-3c60-4812-ad49-144bf43a8ddf volume.status=creating

[ibrokethecloud]

lgtm. thanks for the PR. we should merge this after 1.4.0 is out

[starbops]

Overall LGTM, just one nit. Thank you.