feat: Add privileged_client support to VirtualMachineInstance (#2648)

* feat: Add privileged_client support to VirtualMachineInstance

Introduce explicit privileged_client parameter across VirtualMachineInstance
methods to support proper RBAC-aware client usage.

New public methods replacing deprecated properties:
- get_virt_launcher_pod, get_virt_handler_pod, get_node, get_xml_dict

Modified methods with privileged_client parameter:
- pause, unpause, reset, get_xml, execute_virsh_command
- get_dommemstat, get_domstate, wait_until_running, api_request

New private helpers:
- _get_pod_user_uid, _is_pod_root
- _get_hypervisor_connection_uri, _build_virsh_cmd
- _resolve_privileged_client, _get_subresource_api_url

Warning strategy:
- FutureWarning when privileged_client is omitted
- DeprecationWarning on old property-based access

* fix: Address CodeRabbit review comments for privileged_client support

- Pass original privileged_client (not resolved _client) to api_request in pause/unpause/reset
- Handle unset runAsUser in _get_pod_user_uid (return int | None) and _is_pod_root (explicit uid == 0 check)
- Use self.logger.exception() for error-path diagnostics in wait_until_running

* refactor: Simplify privileged_client implementation

- Remove _resolve_privileged_client helper and FutureWarning mechanism
- Use simple 'privileged_client or self.client' fallback pattern
- Deprecated properties emit DeprecationWarning only
- Fix _is_pod_root to treat unset runAsUser as root (Kubernetes default)

* udpate clients

* remvoe used once

* update virsh_cmd

* restore ocp_resources/resource.py - not chnage needed

Author: rnetser