Generated client change for 8.0.0 release

[roycaihw]

Merged master branch into release-8.0 branch and re-generated client (the last two commits, contain only version constant changes).

The next step is to make distribution packages and create github release.

/assign @yliaog

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[yliaog]

/lgtm
/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: roycaihw, yliaog

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