Borrowed heavily from Vault

UI: Region Switcher

This is a more idiomatic way to handle the QP resetting in the
application controller.

vendor: fix blake2b on non-amd64 archs

Skip update checking if DisableUpdateCheck is set to true

Base go-plugin client/server

Convert HCL Interface values to Cty Values

Without this, the data (query params) get json stringified

The UI will no longer try to redirect to the appropriate namespace or
region if one is found in localStorage. Instead, it will assume that
the lack of query param means the default namespaces or region is
desired.

This protects against volatility in the server and, more commonly, ACLs
returning forbidden responses.

The default region shouldn't be used as a qp since no qp means the same
thing.

Default params don't make it into arguments which were being splatted
into the call to super.

This is incredibly tricky with query params, since there is a bundle of
timing issues, lifecycle issues, missing features, and all around
gotchas with query params.

This solution has no observers and no instances of the system service
being set from the jobs controller.

The upside to this is no observers, much easier to follow logic, no more
dependent key chain reactions.