Test HA seal migration in the `seal_ha` by removing the primary seal,
ensuring seal rewrap has completed, and verifying that data written
through the primary seal is available in the new primary seal.
We also add a verification for the seal type at various stages of the scenario.
* Allow configuring the seal alias and priority in the `start_vault`
module.
* Add seal migration to `seal_ha` scenario.
* Verify the data written through the original primary seal after the
seal migration.
* [QT-629] Verify the seal type at various stages in `seal_ha`.
Signed-off-by: Ryan Cragun <me@ryan.ec>
30a8435499