release-21.1: backupccl: prevent restoring a newer backup #62398
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Backport 1/1 commits from #61737.
/cc @cockroachdb/release
This adds a check during RESTORE that the backup(s) being restored were produced by a version
no newer than the current version. The build info for the version that produced a
backup is persisted in the manifest and is used for this check.
Release note (ops change): RESTORE now refuses to restore BACKUPs made by newer versions.