[Enhancement] Read schema support S3 in SDK/CSDK

[xubo245]

Hi, all
    SDK/CSDK don't support read schema support S3, which is limit for user
to use SDK/CSDK, for example, some user save data in S3 and want to read
schema from the data with SDK/CSDK,  it will throw some exception.
     So we should support read schema support S3.

Thank you.
                   Xubo



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[xubo245]

I already raise a PR for it。
https://github.com/apache/carbondata/pull/2931



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