Bump to OpenBao v2.4.0

This merged CAS support, inline authentication, static unseal, and declarative self-init.

Skipping container tests by default is not yet landed upstream, however, and so remains as a patch.

Signed-off-by: Alexander Scheel <ascheel@gitlab.com>

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See also: https://github.com/openbao/openbao/releases/tag/v2.4.0