fix: disable job migrations and reschedules (#1017)

<!-- Please make sure there is an issue that this PR is correlated to. -->
Fixes RVT-3774
## Changes

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svc/pkg/ds/ops/server-create/src/lib.rs

@@ -799,6 +799,16 @@ pub async fn handle(
 			]),
 			..TaskGroup::new()
 		}]),
+		// Disables migrating in the event of a node drain
+		migrate: Some(Box::new(MigrateStrategy {
+			max_parallel: Some(0),
+			..MigrateStrategy::new()
+		})),
+		// Disables rescheduling in the event of a node drain
+		reschedule: Some(Box::new(ReschedulePolicy {
+			attempts: Some(0),
+			..ReschedulePolicy::new()
+		})),
 		..Job::new()
 	};
 

svc/pkg/faker/ops/job-template/src/lib.rs

@@ -57,6 +57,16 @@ fn gen_job(
 			tasks: Some(vec![task]),
 			..TaskGroup::new()
 		}]),
+		// Disables migrating in the event of a node drain
+		migrate: Some(Box::new(MigrateStrategy {
+			max_parallel: Some(0),
+			..MigrateStrategy::new()
+		})),
+		// Disables rescheduling in the event of a node drain
+		reschedule: Some(Box::new(ReschedulePolicy {
+			attempts: Some(0),
+			..ReschedulePolicy::new()
+		})),
 		..Job::new()
 	})
 }

svc/pkg/job-run/worker/src/workers/create/create_job.rs

@@ -369,6 +369,16 @@ mod tests {
 				}]),
 				..TaskGroup::new()
 			}]),
+			// Disables migrating in the event of a node drain
+			migrate: Some(Box::new(MigrateStrategy {
+				max_parallel: Some(0),
+				..MigrateStrategy::new()
+			})),
+			// Disables rescheduling in the event of a node drain
+			reschedule: Some(Box::new(ReschedulePolicy {
+				attempts: Some(0),
+				..ReschedulePolicy::new()
+			})),
 			..Job::new()
 		}
 	}

svc/pkg/mm-config/ops/version-prepare/src/prewarm_ats.rs

@@ -178,6 +178,16 @@ fn gen_prewarm_job(artifact_count: usize) -> GlobalResult<nomad_client::models::
 			}]),
 			..TaskGroup::new()
 		}]),
+		// Disables migrating in the event of a node drain
+		migrate: Some(Box::new(MigrateStrategy {
+			max_parallel: Some(0),
+			..MigrateStrategy::new()
+		})),
+		// Disables rescheduling in the event of a node drain
+		reschedule: Some(Box::new(ReschedulePolicy {
+			attempts: Some(0),
+			..ReschedulePolicy::new()
+		})),
 		..Job::new()
 	})
 }

svc/pkg/mm/worker/src/workers/lobby_create/nomad_job.rs

@@ -576,6 +576,16 @@ pub fn gen_lobby_docker_job(
 			]),
 			..TaskGroup::new()
 		}]),
+		// Disables migrating in the event of a node drain
+		migrate: Some(Box::new(MigrateStrategy {
+			max_parallel: Some(0),
+			..MigrateStrategy::new()
+		})),
+		// Disables rescheduling in the event of a node drain
+		reschedule: Some(Box::new(ReschedulePolicy {
+			attempts: Some(0),
+			..ReschedulePolicy::new()
+		})),
 		..Job::new()
 	})
 }