Try to fix exporter acceptance

Signed-off-by: Natalie Arellano <[email protected]>

acceptance/exporter_test.go

@@ -403,6 +403,7 @@ func testExporterFunc(platformAPI string) func(t *testing.T, when spec.G, it spe
 							var err error
 							cacheDir, err = os.MkdirTemp("", "cache")
 							h.AssertNil(t, err)
+							h.AssertNil(t, os.Chmod(cacheDir, 0777)) // Override umask
 
 							cacheFixtureDir := filepath.Join("testdata", "exporter", "cache-dir")
 							h.AssertNil(t, fsutil.Copy(cacheFixtureDir, cacheDir))
@@ -433,7 +434,6 @@ func testExporterFunc(platformAPI string) func(t *testing.T, when spec.G, it spe
 									"--env", "CNB_PLATFORM_API="+platformAPI,
 									"--env", "CNB_REGISTRY_AUTH="+exportRegAuthConfig,
 									"--network", exportRegNetwork,
-									"--user", "root",
 									"--volume", fmt.Sprintf("%s:/cache", cacheDir),
 								),
 								h.WithArgs(exportArgs...),