[WIP] Add a new federated-hpa proposal

[chaunceyjiang]

Signed-off-by: chaunceyjiang [email protected]

What type of PR is this? /kind design

What this PR does / why we need it:

Which issue(s) this PR fixes: Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

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[RainbowMango]

Thanks @chaunceyjiang Could we have a chat at the next meeting?

[chaunceyjiang]

Thanks @chaunceyjiang Could we have a chat at the next meeting?

ok. @RainbowMango