[WIP] [Core] Support of reading Working dir from HUAWEI Object Storage Service (OBS)

[imhy]

This PR add ability to read working dir stored as archive in OBS.

Why are these changes needed?

User will be able to run submit tasks specifying the location of the working directory in OBS.

Related issue number

Changes made according to REP
PR to smart_open

Checks

• I've signed off every commit(by using the -s flag, i.e., git commit -s) in this PR.
• I've run scripts/format.sh to lint the changes in this PR.
• I've included any doc changes needed for https://docs.ray.io/en/master/.
  • I've added any new APIs to the API Reference. For example, if I added a
    method in Tune, I've added it in doc/source/tune/api/ under the
    corresponding .rst file.
• I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/
• Testing Strategy
  • Unit tests
  • Release tests
  • This PR is not tested :(

@edoakes please take this PR.

[edoakes]

@imhy does smart_open already support obs:// URIs? Couldn't find anything on the docs -- please point me to it if you can

[imhy]

@imhy does smart_open already support obs:// URIs? Couldn't find anything on the docs -- please point me to it if you can

@edoakes Currently I`m working on extending smart_open, PR is open.

When this PR will be approved I will inform You.