feat: add mgmt endpoint & cli command for infra machine reboot

Introduce a new mgmt endpoint to reboot an infra machine and wait for the reboot request to be processed by the respective infra provider. It does the heavy lifting of modifying/waiting for the resources.

Additionally:
- In the `InfraMachineController`, to verify that the machine info was collected before powering it off, check the `TalosVersion` on the `MachineStatus` instead of `SecureBootStatus`. It is a more suitable field to check this.
- Rename the infra provider label prefix format from being `omni.sidero.dev/infra-provider[provider-id]/key=value` to be `omni.sidero.dev/infra-provider/provider-id/key=value`.

Signed-off-by: Utku Ozdemir <[email protected]>

client/api/omni/management/management.proto

@@ -172,6 +172,15 @@ message ReadAuditLogResponse {
   bytes audit_log = 1;
 }
 
+message RebootMachineRequest {
+  string machine_id = 1;
+}
+
+message RebootMachineResponse {
+  string reboot_id = 1;
+  google.protobuf.Timestamp last_reboot_timestamp = 3;
+}
+
 service ManagementService {
   rpc Kubeconfig(KubeconfigRequest) returns (KubeconfigResponse);
   rpc Talosconfig(TalosconfigRequest) returns (TalosconfigResponse);
@@ -187,4 +196,5 @@ service ManagementService {
   rpc CreateSchematic(CreateSchematicRequest) returns (CreateSchematicResponse);
   rpc GetSupportBundle(GetSupportBundleRequest) returns (stream GetSupportBundleResponse);
   rpc ReadAuditLog(ReadAuditLogRequest) returns (stream ReadAuditLogResponse);
+  rpc RebootMachine(RebootMachineRequest) returns (RebootMachineResponse);
 }