hook: Move OCI hooks handling to the CLI

The CLI being the implementation of the OCI specification, and the
hooks being OCI specific, it makes sense to move the handling of any
OCI hooks to the CLI level. This changes allows the Kata API to
become OCI agnostic.

Fixes #599

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

virtcontainers/api_test.go

@@ -143,22 +143,10 @@ func newTestSandboxConfigHyperstartAgentDefaultNetwork() SandboxConfig {
 		SockTtyName: testHyperstartTtySocket,
 	}
 
-	hooks := Hooks{
-		PreStartHooks: []Hook{
-			{
-				Path: getMockHookBinPath(),
-				Args: []string{testKeyHook, testContainerIDHook, testControllerIDHook},
-			},
-		},
-		PostStartHooks: []Hook{},
-		PostStopHooks:  []Hook{},
-	}
-
 	netConfig := NetworkConfig{}
 
 	sandboxConfig := SandboxConfig{
-		ID:    testSandboxID,
-		Hooks: hooks,
+		ID: testSandboxID,
 
 		HypervisorType:   MockHypervisor,
 		HypervisorConfig: hypervisorConfig,