The block manager changes made as an initial part of the tiered storage work includes the use of "logid" to indicate a log structured id.  We've changed our naming elsewhere to speak of "object ids" to reference the individual file components of a btree, so variable names matching "logid", etc. should be updated to match.

Another point of cleanup is that the initial code allowed btrees to be configured with "block_allocation" to be "log-structured". Our code base no longer uses this value to mark tiered objects, instead we have a new "tiered:" kind of btree.  So it's probable that this can be outright removed, and old tests that use them can be removed or replaced by newer test code.