Add test_follower option to crash test #13282
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Summary
Context: We want to enable secondaries and followers to be tested in crash tests. #13281 added the ability to verify the values returned by
Get()requests to secondaries against theExpectedState. Although there was atest_secondaryflag, none of the old secondary verification code was actually being executed in the recurring crash test suites. There also was no flag to enable even the creation of a follower instance.First, this PR adds a new flag that lets us open a follower database inside the crash test. It is modeled after the code/flags for secondaries. The follower itself presumably has some
assertstatements inside its implementation, so this would not be completely useless on its own.Test Plan