Support raw.tar.gz files

[a180285]

What this PR does / why we need it:

When I try to import xxx.raw.tar.gz it will failed.
And only do ungzip but not untar

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

Release note:

Support import xxx.raw.tar.gz files

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[a180285]

@alromeros Can you help give some comment on this PR?

[alromeros]

Hey @a180285! I see we already have an open PR that's aiming to implement tar imports (#2748), so it might conflict with yours. The discussion there also implies that tar imports might not be as straightforward to implement, so I'd suggest reviewing it or proposing ideas/suggestions that you might have there.

Thanks for your contribution!

[a180285]

Thanks, I see. Before that, I can use my changed version. Hope that PR can be merged soon.