Deno.makeTempDir() check permissions

[manyuanrong]

closes #3729

[ry]

Looks good but can you add a unit test to cli/js/make_temp_dir_test.ts which checks permission? There are permission checking examples in that folder for other FS methods.

(To run the tests: cargo test unit_test)

[manyuanrong]

@ry There are already test cases for perm in make_temp_dir_test.ts. Like makeDir and readFile, only the permission switch flag is tested. There is no whitelist of test permissions.

[ry]

@manyuanrong Ah - I see. Hmm. We need some way to test whitelist permissions, but let's just land your PR now. We can kick that can down the road. Thank you.