[server] Deprecate updatePassword
[server] Deprecate updatePassword

Summary: (This is the endpoint you would previously reach if you press the link in a "reset your password" email.)

Test Plan: Flow

Reviewers: atul, palys-swm

Reviewed By: palys-swm

Subscribers: KatPo, Adrian

Differential Revision: https://phabricator.ashoat.com/D1473

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