Intent to backport OAK-7721

[Francesco Mari]

I intend to backport OAK-7721 to the 1.8 and 1.6 branches. The fix prevents
the segment buffers from being corrupted when too big records are
persisted. The corruption is only detected when the buffer is flushed to
disk, when it's too late to detect the code path that led to the
corruption. The fix fails earlier and louder, preventing the segment buffer
from being corrupted and allowing us to identify the defective code path.