Upgrade from the old go-jose v2.6.1 to the newly minted go-jose v4.0.1.
Cleans up old code now that `jose.ParseSigned` can take a list of
supported signature algorithms.
Fixes https://github.com/letsencrypt/boulder/issues/7390
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Co-authored-by: Aaron Gable <aaron@letsencrypt.org>
Originally, WFEs had a built-in nonce service. Then we added a "remote
nonce service" via gRPC, but we kept a fallback path for when the remote
nonce service was not configured, to use a built-in nonce service. This
PR removes that fallback path.
Since the fallback path was relied on by the unittests, this also
refactors the unittests to use a gRPC-style nonce service (but in-memory
for the unittests).
Fixes#6530
Phil Porada