Nydus Image Service v2.1.2

Binaries download mirror (sync within a few hours): https://registry.npmmirror.com/binary.html?path=nydus/v2.1.2/

What's Changed

• storage: remove unused code for refreshing registry tokens by @sctb512 in #842
• storage: fix registry to avoid print bearer auth by @sctb512 in #870
• nydusify: beautify version print message of nydusify by @changweige in #872
• cargo: update version of dbs-uhttp by @changweige in #877
• fix too frequent retry by @changweige in #880
• 2.1 port nydusify by @changweige in #898
• rafs: prefetch based on blob chunks rather than files by @changweige in #887
• 2.1 prefetch metrics by @changweige in #892
• Let nydusd show prefetch bandwidth and latency by @changweige in #899
• [backport] nydusd: automatically retry registry http scheme by @imeoer in #914
• 2.1 backoff retry by @changweige in #936
• rafs: fix a bug in fs prefetch by @changweige in #939
• nydusd: register signal hanlder earlier by @changweige in #940

Full Changelog: v2.1.1...v2.1.2