Refactor interfaces to use a runner manager and an environment manager.

See https://gitlab.hpi.de/codeocean/codemoon/poseidon/-/issues/44.

environment/manager_mock.go

@@ -0,0 +1,25 @@
+// Code generated by mockery v0.0.0-dev. DO NOT EDIT.
+
+package environment
+
+import mock "github.com/stretchr/testify/mock"
+
+// ManagerMock is an autogenerated mock type for the Manager type
+type ManagerMock struct {
+	mock.Mock
+}
+
+// Create provides a mock function with given fields: id, prewarmingPoolSize, cpuLimit, memoryLimit, image, networkAccess, exposedPorts
+func (_m *ManagerMock) Create(id string, prewarmingPoolSize uint, cpuLimit uint, memoryLimit uint, image string, networkAccess bool, exposedPorts []uint16) {
+	_m.Called(id, prewarmingPoolSize, cpuLimit, memoryLimit, image, networkAccess, exposedPorts)
+}
+
+// Delete provides a mock function with given fields: id
+func (_m *ManagerMock) Delete(id string) {
+	_m.Called(id)
+}
+
+// Load provides a mock function with given fields:
+func (_m *ManagerMock) Load() {
+	_m.Called()
+}