#89 Generalise the three Storage interfaces and structs into one generic storage manager.

internal/environment/nomad_manager.go

@@ -8,6 +8,7 @@ import (
 	"github.com/openHPI/poseidon/internal/runner"
 	"github.com/openHPI/poseidon/pkg/dto"
 	"github.com/openHPI/poseidon/pkg/logging"
+	"github.com/openHPI/poseidon/pkg/storage"
 	"os"
 )
 
@@ -141,7 +142,7 @@ func (m *NomadEnvironmentManager) Load() error {
 			apiClient:   m.api,
 			jobHCL:      templateEnvironmentJobHCL,
 			job:         job,
-			idleRunners: runner.NewLocalRunnerStorage(),
+			idleRunners: storage.NewLocalStorage[runner.Runner](),
 		}
 		m.runnerManager.StoreEnvironment(environment)
 		jobLogger.Info("Successfully recovered environment")
@@ -180,7 +181,7 @@ func fetchEnvironment(id dto.EnvironmentID, apiClient nomad.ExecutorAPI) (runner
 				apiClient:   apiClient,
 				jobHCL:      templateEnvironmentJobHCL,
 				job:         job,
-				idleRunners: runner.NewLocalRunnerStorage(),
+				idleRunners: storage.NewLocalStorage[runner.Runner](),
 			}
 		}
 	}