unit-test failed on ~ Ubuntu 18.04 PPC

Host: ubuntu1804-ppc-5.pic.build.10gen.cc
Project: WiredTiger (develop)
Commit: diff: WT-7498 Add tiered work unit queues. (#6555)

• WT-7498 Add tiered work unit queues.

• Implement getters

• Fix compilation error.

• Add beginnings of tiered flush work loop.

• First pass at internal thread handling all flushing.

• Compilation fixes.

• Compilation fixes.

• Fix conditional variable use.

• Add object: as a supported/known object type. Add it into schema_alter.

• Fix alter_object to just update the metadata.

• Hold schema lock for metadata changes.

• Use schema lock. Remove unused variable.

• Call metadata update directly with merged config.

• Fix initialization.

• Refactor and test from flush_tier path.

• Add some debugging for visibility assertion.

• Clean up for review.

• More cleanup before review.

• Remove unneeded initialization.

• Initialize variables.

• Free work units on destroy.

• Whitespace

• Remove ifdef. Rename stat.

• Restore accidentally deleted line.

• Fix session usage broken in earlier commit. | 24 May 21 20:51 UTC
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