Problem Description:

Chunkcache testing (WT-11010) isn't active on develop because it requires tiered storage, which is currently disabled in format testing (WT-10822). When tiered testing is enabled, Chunkcache testing will follow, but there have been timeout issues running test/format tests with Chunkcache configuration (see patch link in the comments).

FYI - I have run format testing with chunkcache enabled numerous times and only observed timeout issues.

Acceptance criteria:

-The ticket requires the following work -- 

• Reproduce the test/format hangs locally. 
• Investigate and fix the hangs.
• (scope changed: See recent comment)

How to run the testing locally - 

• For a fresh run (reproduces 1/10 times):

format_args="tiered_storage.storage_source=dir_store tiered_storage.flush_frequency=100 checkpoint.wait=15 runs.source=table runs.timer=10"
./t $format_args
./t -R $format_args (this should run chunkcache)

* From the failure config (couldn't repro )

./t -c CONFIG
./t -R