Remove hardcoded /tmp in tempfile paths

There's no specific need mentioned at the points it was added, and it
makes the Windows-hosted test run setup slightly weird.

Signed-off-by: Paul "TBBle" Hampson <Paul.Hampson@Pobox.com>

integration/addition_gids_test.go

@@ -31,7 +31,7 @@ import (
 )
 
 func TestAdditionalGids(t *testing.T) {
-	testPodLogDir, err := os.MkdirTemp("/tmp", "additional-gids")
+	testPodLogDir, err := os.MkdirTemp("", "additional-gids")
 	require.NoError(t, err)
 	defer os.RemoveAll(testPodLogDir)
 

integration/container_log_test.go

@@ -30,7 +30,7 @@ import (
 )
 
 func TestContainerLogWithoutTailingNewLine(t *testing.T) {
-	testPodLogDir, err := os.MkdirTemp("/tmp", "container-log-without-tailing-newline")
+	testPodLogDir, err := os.MkdirTemp("", "container-log-without-tailing-newline")
 	require.NoError(t, err)
 	defer os.RemoveAll(testPodLogDir)
 
@@ -80,7 +80,7 @@ func TestContainerLogWithoutTailingNewLine(t *testing.T) {
 }
 
 func TestLongContainerLog(t *testing.T) {
-	testPodLogDir, err := os.MkdirTemp("/tmp", "long-container-log")
+	testPodLogDir, err := os.MkdirTemp("", "long-container-log")
 	require.NoError(t, err)
 	defer os.RemoveAll(testPodLogDir)
 

integration/pod_dualstack_test.go

@@ -31,7 +31,7 @@ import (
 )
 
 func TestPodDualStack(t *testing.T) {
-	testPodLogDir, err := os.MkdirTemp("/tmp", "dualstack")
+	testPodLogDir, err := os.MkdirTemp("", "dualstack")
 	require.NoError(t, err)
 	defer os.RemoveAll(testPodLogDir)
 

integration/pod_hostname_test.go

@@ -64,7 +64,7 @@ func TestPodHostname(t *testing.T) {
 			if test.needsHostNetwork && goruntime.GOOS == "windows" {
 				t.Skip("Skipped on Windows.")
 			}
-			testPodLogDir, err := os.MkdirTemp("/tmp", "hostname")
+			testPodLogDir, err := os.MkdirTemp("", "hostname")
 			require.NoError(t, err)
 			defer os.RemoveAll(testPodLogDir)